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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.

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61 products

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

    Zuri knit shirt

    € 305
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    • NEW SEASON
    Anja cotton-blend bralette | Sir available sizes
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    • EXCLUSIVE
    Exclusive to Mytheresa – Alexandre linen maxi dress | Sir available sizes
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    • NEW SEASON
    Willa lace-trim satin minidress | Sir available sizes
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    • NEW ARRIVAL
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    Anja cotton midi dress | Sir available sizes
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    • EXCLUSIVE
    Exclusive to Mytheresa – Alexandre linen minidress | Sir available sizes
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    • NEW ARRIVAL
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    Alexandre cutout linen minidress | Sir available sizes
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    • NEW SEASON
    Devin polka-dot swimsuit | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Anja cotton-blend poplin midi skirt | Sir available sizes
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    • NEW ARRIVAL
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    Devin polka-dot bikini top | Sir available sizes
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    • NEW SEASON
    Maja cotton jacquard midi dress | Sir available sizes
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    • NEW SEASON
    Celia floral cutout midi dress | Sir available sizes
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    • NEW SEASON
    Marco cotton-blend midi dress | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Alexandre floral linen midi dress | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Kelvin cutout maxi dress | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Devin polka-dot bikini bottoms | Sir available sizes
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    • NEW SEASON
    Marco crêpe bustier top | Sir available sizes
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    • NEW SEASON
    Celia floral wide-leg pants | Sir available sizes
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    • NEW SEASON
    Clemence bustier top | Sir
    Sir

    Clemence bustier top

    € 235
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    • NEW SEASON
    Marco cotton-blend minidress | Sir available sizes
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    • NEW SEASON
    Devin polka-dot bikini top | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Margot polka-dot silk minidress | Sir available sizes
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    • NEW SEASON
    Celia floral cotton and silk shirt | Sir available sizes
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    • NEW SEASON
    Franc cotton and silk maxi dress | Sir available sizes
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    • NEW SEASON
    Devin high-rise bikini bottoms | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Zuri knit wide-leg pants | Sir available sizes
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    • NEW SEASON
    Clemence high-rise shorts | Sir available sizes
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    • NEW ARRIVAL
    • NEW SEASON
    Anja cotton midi dress | Sir available sizes
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    • NEW SEASON
    Celia cotton and silk midi dress | Sir available sizes
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    • NEW SEASON
    Clemence vest | Sir
    Sir

    Clemence vest

    € 295
    available sizes
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    • 3
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    • NEW SEASON
    Willa lace-trimmed silk gown | Sir available sizes
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    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-jersey bodysuit | Sir available sizes
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  • Romi high-rise biker shorts | Sir
    Sir

    Romi high-rise biker shorts

    € 215

    € 107

    50% off
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    • 3
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    • EXCLUSIVE
    Exclusive to Mytheresa – Ingrid stretch-knit bodysuit | Sir available sizes
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  • Romi stretch-knit bralette | Sir
    Sir

    Romi stretch-knit bralette

    € 215

    € 64

    70% off
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    • 3
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  • Vivienne silk dress | Sir
    Sir

    Vivienne silk dress

    € 519

    € 207

    60% off
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  • Vivienne floral swimsuit | Sir
    Sir

    Vivienne floral swimsuit

    € 269

    € 107

    60% off
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  • Vivienne printed silk top | Sir
    Sir

    Vivienne printed silk top

    € 299

    € 209

    30% off
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  • Romi stretch-knit bodysuit | Sir
    Sir

    Romi stretch-knit bodysuit

    € 319

    € 223

    30% off
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  • Romi one-shoulder bodysuit | Sir
    Sir

    Romi one-shoulder bodysuit

    € 319

    € 191

    40% off
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  • Vivienne silk miniskirt | Sir
    Sir

    Vivienne silk miniskirt

    € 345

    € 241

    30% off
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  • Eddita silk satin skirt | Sir
    Sir

    Eddita silk satin skirt

    € 339

    € 237

    30% off
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    • 1
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    • 2
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  • Vivienne bikini bottoms | Sir
    Sir

    Vivienne bikini bottoms

    € 109

    € 76

    30% off
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  • Maxe bustier top | Sir
    Sir

    Maxe bustier top

    € 299

    € 149

    50% off
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    • 3
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  • One-shoulder swimsuit | Sir
    Sir

    One-shoulder swimsuit

    € 269

    € 188

    30% off
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  • Seville cropped wool-blend sweater | Sir
    Sir

    Seville cropped wool-blend sweater

    € 399

    € 239

    40% off
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    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk crop top | Sir available sizes
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  • Marne cotton maxi dress | Sir
    Sir

    Marne cotton maxi dress

    € 419

    € 293

    30% off
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    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk maxi skirt | Sir available sizes
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    • EXCLUSIVE
    Exclusive to Mytheresa – Floral tiered midi dress | Sir available sizes
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  • Vivienne silk maxi dress | Sir
    Sir

    Vivienne silk maxi dress

    € 575

    € 402

    30% off
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    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk crop top | Sir available sizes
    • 3
      M

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  • Editta silk satin dress | Sir
    Sir

    Editta silk satin dress

    € 385

    € 269

    30% off
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    • 0
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    • EXCLUSIVE
    Exclusive to Mytheresa – Madelyn linen crop top | Sir available sizes
    • 0
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    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-knit midi dress | Sir available sizes
    • 2
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    • 3
      M

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    • 0
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    • 1
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    • EXCLUSIVE
    Exclusive to Mytheresa – Clementine cotton and silk minidress | Sir available sizes
    • 3
      M

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    • EXCLUSIVE
    Exclusive to Mytheresa – Blanche linen maxi skirt | Sir sold out

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    • 1
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  • Seville crewneck sweater | Sir
    Sir

    Seville crewneck sweater

    € 425

    € 170

    60% off
    available sizes
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    • 2
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    • 0
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  • Celena cutout maxi dress | Sir
    Sir

    Celena cutout maxi dress

    € 425

    € 297

    sold out
    sold out

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    • 1
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    • EXCLUSIVE
    Exclusive to Mytheresa – Stretch-knit midi dress | Sir sold out

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    • 0
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    • 1
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    • 3
      M

61 products