SIR.
Established · $200–$400 · Sydney, Australia
Minimalist silk dresses and separates with open-back details, the Australian label that built a uniform for endless summer.
Think: vacation mode, always
The buy: the printed set
What to buy
the printed set
Categories
Occasions
Sustainability
Why SIR. is worth it
SIR. makes easy silk dresses and matching sets in prints of its own, holiday dressing that still looks considered once you're home.
The shapes are built to move: wrap halters, bias-cut trousers, slips and shirts, often finished with an open back or a tie. Each print is exclusive to the label and placed to suit the garment, then carried across a shirt, trousers and a bikini, so a whole outfit can match. Natural fibres have been the base from the start, with silk leading and linen and cotton close behind.
SIR. picks
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Is now a good time?
About SIR.
Nikki Campbell and Sophie Coote started SIR. in 2014 from an apartment in Bondi, Sydney, selling online first. The name is short for separates, intimates and ready-to-wear.
They built it on relaxed, minimal shapes in natural fibres, and it became known for slip dresses, matching printed sets and swim that read like a holiday wardrobe you can wear all year.
- Founded
- 2014
- Founded by
- Nikki Campbell and Sophie Coote
- Based in
- Sydney, Australia
- Made of
- Mostly natural fibres: silk, linen and cotton, plus RWS wool, lyocell and recycled polyester
- Shipping
- Ships to the US by UPS Express from Sydney, free over $400, with taxes and duties included in US prices; ships worldwide by DHL Express, mostly duty paid.
- Where to buy
- SIR.'s own site · Our SIR. picks
What shoppers say
From reviews and try-on videos, in our words.
- Fit
Each product page rates the fit, and many pieces are marked true to size. Sizes run 0 to 4 (about US 2 to 10), plus a petite 0P with shorter lengths for women under about 5'3".
- Care
Silk pieces such as the Sorrento bias-cut pant are dry clean only, so factor in care before buying a lot of silk.
- Quality
Public reviews are few and mixed: a handful of buyers felt the quality fell short of the price, with seams loosening after a few wears. Check the finish as soon as your order arrives, while returns are open.
- Shipping
US orders go by UPS Express from Sydney, free over $400, and taxes and duties are already in the price, so nothing is due on delivery.
- Returns
You have 14 days, and US returns go to a US address. Refunds cover full-price pieces only, minus a $15 label fee; sale pieces get store credit or a free size swap.
What SIR. is made of
Silk · Cotton · Viscose
- Natural
- 61%
- Plant-based
- 16%
- Synthetic
- 23%
Works most in: silk, cotton and viscose
From the fabric listed on 203 pieces · 99% of the range lists it · Checked October 2026
SIR. in our edits
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If you like SIR.
The buy: the linen mini dress
Vintage-inspired linen dresses and separates in natural fibers, the Sydney slow-fashion label that made restraint feel luxurious.
The buy: the tailored blazer
Vintage-inspired knitwear and precise tailoring in a monochrome palette, the Scandi label built on restraint.
The buy: the sheer-skirt column dress
Occasion dresses with sheer layers and fluid silhouettes, resort wear that moves from ocean to evening.
The buy: the draped asymmetric dress
Draped dresses and fluid separates with asymmetric cuts, made for women who see getting dressed as cinema.
SIR., answered
- What is SIR.?
- SIR. is an Australian label from Sydney making silk and linen dresses, separates and swimwear in relaxed, minimal shapes and prints of its own.
- Is SIR. a good brand?
- Yes. We like it for natural-fibre holiday dressing: silk slips, matching printed sets and swim, a petite size option, and US shipping with duties already included.
- Who founded SIR.?
- Nikki Campbell and Sophie Coote founded it in 2014.
- Where is SIR. from?
- Sydney, Australia. It started in an apartment in Bondi.
- Does SIR. run true to size?
- Many pieces are marked true to size, and each product page rates the fit. Sizes run 0 to 4 (about US 2 to 10), plus a petite 0P.
- Does SIR. ship to the US?
- Yes. US orders go by UPS Express, free over $400, with duties and taxes included in the price.
- Where can I buy SIR.?
- On the brand's own site, or through our SIR. picks.
- What is SIR. made of?
- Across the 203 SIR. pieces we could read in October 2026, about 61% of the fabric is natural fibers, 16% plant-based fibers like viscose and 23% synthetic. The most common fabrics are silk, cotton and viscose.
- Which brands are like SIR.?
- If you like SIR., look at Posse, The Garment, Solaqua and Belle Anna.