Please choose the destination of delivery.

Please note: the items in your shopping bag may be deleted if you change your region or your delivery destination.

An acronym for “separates, intimates and ready-to-wear,” Sir equips the modern woman with effortlessly feminine staples. It's a brand born of wanderlust and a want for effortless style, so its pieces belong as much in a suitcase as in the everyday wardrobe.

Drawing inspiration from the Australian coast, best friends Nikki Campbell and Sophie Cootewhat started with an online-only capsule collection that has quickly grown into an expansive selection ranging from dresses to two-piece suiting. From beach to boardroom, Sir has you covered with a new standard in essentials.

Reductions by %

Designer

  • Top 10
  • S

Size

Colours

Pattern

61 products

    • NEW ARRIVAL
    • NEW SEASON
    Zuri knit shirt | Sir
    Sir

    Zuri knit shirt

    ¥ 37,100
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Anja cotton-blend bralette | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW ARRIVAL
    • EXCLUSIVE
    Exclusive to Mytheresa – Alexandre linen maxi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Anja cotton midi dress | Sir
    Sir

    Anja cotton midi dress

    ¥ 56,200
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Alexandre linen minidress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Alexandre cutout linen minidress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Willa lace-trim satin minidress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Devin polka-dot swimsuit | Sir
    Sir

    Devin polka-dot swimsuit

    ¥ 32,100
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW ARRIVAL
    • NEW SEASON
    Anja cotton-blend poplin midi skirt | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Maja cotton jacquard midi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Kelvin cutout maxi dress | Sir
    Sir

    Kelvin cutout maxi dress

    ¥ 48,600
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Marco crêpe bustier top | Sir
    Sir

    Marco crêpe bustier top

    ¥ 37,100
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Celia floral cotton and silk shirt | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Celia floral wide-leg pants | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Marco cotton-blend minidress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Devin polka-dot bikini top | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW ARRIVAL
    • NEW SEASON
    Margot polka-dot silk minidress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW ARRIVAL
    • NEW SEASON
    Devin polka-dot bikini top | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Clemence bustier top | Sir
    Sir

    Clemence bustier top

    ¥ 28,300
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Alexandre floral linen midi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Franc cotton and silk maxi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Marco cotton-blend midi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Devin high-rise bikini bottoms | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW ARRIVAL
    • NEW SEASON
    Zuri knit wide-leg pants | Sir
    Sir

    Zuri knit wide-leg pants

    ¥ 38,400
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Devin polka-dot bikini bottoms | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Celia floral cutout midi dress | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW ARRIVAL
    • NEW SEASON
    Anja cotton midi dress | Sir
    Sir

    Anja cotton midi dress

    ¥ 49,800
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • NEW SEASON
    Celia cotton and silk midi dress | Sir available sizes
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Clemence high-rise shorts | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Clemence vest | Sir
    Sir

    Clemence vest

    ¥ 35,900
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • NEW SEASON
    Willa lace-trimmed silk gown | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • 4
      JP 13
    • 6
      JP 17
    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-jersey bodysuit | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Romi high-rise biker shorts | Sir
    Sir

    Romi high-rise biker shorts

    ¥ 25,700

    ¥ 12,800

    50% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Ingrid stretch-knit bodysuit | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Romi one-shoulder bodysuit | Sir
    Sir

    Romi one-shoulder bodysuit

    ¥ 38,900

    ¥ 23,300

    40% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne printed silk top | Sir
    Sir

    Vivienne printed silk top

    ¥ 36,600

    ¥ 18,300

    50% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne floral swimsuit | Sir
    Sir

    Vivienne floral swimsuit

    ¥ 32,800

    ¥ 13,100

    60% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne silk miniskirt | Sir
    Sir

    Vivienne silk miniskirt

    ¥ 42,400

    ¥ 29,600

    30% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Romi stretch-knit bralette | Sir
    Sir

    Romi stretch-knit bralette

    ¥ 26,000

    ¥ 7,800

    70% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne bikini bottoms | Sir
    Sir

    Vivienne bikini bottoms

    ¥ 13,200

    ¥ 9,200

    30% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Romi stretch-knit bodysuit | Sir
    Sir

    Romi stretch-knit bodysuit

    ¥ 38,900

    ¥ 23,300

    40% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne silk dress | Sir
    Sir

    Vivienne silk dress

    ¥ 64,000

    ¥ 25,600

    60% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Maxe bustier top | Sir
    Sir

    Maxe bustier top

    ¥ 36,400

    ¥ 21,800

    40% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Seville cropped wool-blend sweater | Sir
    Sir

    Seville cropped wool-blend sweater

    ¥ 49,200

    ¥ 29,500

    40% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • One-shoulder swimsuit | Sir
    Sir

    One-shoulder swimsuit

    ¥ 32,500

    ¥ 22,700

    30% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk crop top | Sir available sizes
    • 0
      JP 5
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Marne cotton maxi dress | Sir
    Sir

    Marne cotton maxi dress

    ¥ 51,200

    ¥ 35,800

    30% off
    available sizes
    • 0
      JP 5
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Eddita silk satin skirt | Sir
    Sir

    Eddita silk satin skirt

    ¥ 41,800

    ¥ 25,000

    40% off
    available sizes
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk maxi skirt | Sir available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Floral tiered midi dress | Sir
    Sir

    Exclusive to Mytheresa – Floral tiered midi dress

    ¥ 49,800

    ¥ 34,800

    30% off
    available sizes
    • 0
      JP 5
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Vivienne silk maxi dress | Sir
    Sir

    Vivienne silk maxi dress

    ¥ 70,300

    ¥ 49,200

    30% off
    available sizes
    • 0
      JP 5
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Madelyn linen crop top | Sir
    Sir

    Exclusive to Mytheresa – Madelyn linen crop top

    ¥ 23,500

    ¥ 16,400

    30% off
    available sizes
    • 0
      JP 5

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk minidress | Sir available sizes
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Editta silk satin dress | Sir
    Sir

    Editta silk satin dress

    ¥ 46,800

    ¥ 28,000

    40% off
    available sizes
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-knit midi dress | Sir
    Sir

    Exclusive to Mytheresa – Stretch-knit midi dress

    ¥ 40,500

    ¥ 28,300

    30% off
    available sizes
    • 2
      JP 9
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Blanche linen maxi skirt | Sir
    Sir

    Exclusive to Mytheresa – Blanche linen maxi skirt

    ¥ 29,900

    ¥ 17,900

    sold out
    sold out

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk crop top | Sir available sizes
    • 3
      JP 11

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Seville crewneck sweater | Sir
    Sir

    Seville crewneck sweater

    ¥ 51,700

    ¥ 15,500

    70% off
    available sizes
    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
  • Celena cutout maxi dress | Sir
    Sir

    Celena cutout maxi dress

    ¥ 51,700

    ¥ 31,000

    sold out
    sold out

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11
    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-knit midi dress | Sir
    Sir

    Exclusive to Mytheresa – Stretch-knit midi dress

    ¥ 40,500

    ¥ 24,300

    sold out
    sold out

    Please choose your size:

    • 0
      JP 5
    • 1
      JP 7
    • 2
      JP 9
    • 3
      JP 11

61 products