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Positano Bikini

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Colour: Positano Bikini

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julia_cavanagh, laa.schu & Jess holliday and 20k+ others wear Sierra Sydney

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The Details

Positano Bikini

Poolside with a vintage postcard energy.

A butter-cream and chocolate polka dot set that does retro better than anything else in your bag. The triangle top ties at the neck and back, with a dainty bead detail at the center that keeps things feminine without trying too hard. The boy shorts sit low on the hip with a chocolate waistband and front tie — more coverage, more personality, same amount of summer. Together they're the set that photographs like a film still and feels even better in real life.

She's the pool deck. The Aperol in hand. The girl everyone asks where she got her swimsuit.

Details:

  • Triangle top with halter neck tie
  • Bead hardware detail at center front
  • Butter-cream base with chocolate polka dot print
  • Chocolate trim and binding throughout
  • Boy shorts bottom with low-rise fit
  • Chocolate waistband with front drawstring tie
  • Sold as a set
Size & Fit

Size & Fit:

  • True to size. We recommend wearing your standard size
  • Designed for a snug, supportive fit — size up for more ease
  • Swimwear knit has comfortable stretch with a secure hold
  • Fully adjustable halter ties for a customised fit
  • Triangle top offers light to moderate coverage
  • Boy short bottoms sit low on the hip with a flattering, cheeky cut

Model: Laura wears a size S

Dress Size: AU 8 / US 4
Height: 172cm / 5' 8"
Bust: 84cm / 33"
Waist: 60cm / 23.5"
Hips: 88cm / 34.5"
Fabric & Care

Fabric & Care:

  • 80% Nylon, 20% Elastane
  • Lightweight swimwear knit with four-way stretch, UPF 50+ protection, and chlorine-resistant construction
  • Smooth, soft hand-feel with a subtle matte finish
  • Hand wash cold separately, lay flat in the shade to dry
  • Do not wring, bleach, or tumble dry
  • Rinse thoroughly after each wear to remove chlorine, salt, and sunscreen
  • Store folded flat to preserve elasticity (avoid hanging, which can stretch the fabric)
Shipping & Returns

We aim to process all orders placed before 23:00 on the same day. However, during busy periods, please allow 1–2 business days for your order to be processed.

Shipping Times
Aus Standard 4 - 8 business days
Aus Express 3 - 5 business days ( Free Over $100)

US Standard 4 - 9 business days
US Express 3 - 5 business days ( Free Over $100)

Free Express Shipping

Free Express Shipping Aus Wide
Free Express Shipping US Wide

Duties & Taxes
All Duties and Taxes are calculated and paid at checkout

30 day returns
We hope you love your new purchase! If it’s not quite right, don’t worry - items can be returned within 30 days.
LIGHTWEIGHT

LIGHTWEIGHT

Breathable fabrics made for warm days.

PERFECT FIT

PERFECT FIT

A comfortable fit that moves with you.

FOR EVERY MOMENT

FOR EVERY MOMENT

Made for work, holidays and everything in between.

MADE TO LAST

MADE TO LAST

Quality that holds its shape.

The Details

Positano Bikini

Poolside with a vintage postcard energy.

A butter-cream and chocolate polka dot set that does retro better than anything else in your bag. The triangle top ties at the neck and back, with a dainty bead detail at the center that keeps things feminine without trying too hard. The boy shorts sit low on the hip with a chocolate waistband and front tie — more coverage, more personality, same amount of summer. Together they're the set that photographs like a film still and feels even better in real life.

She's the pool deck. The Aperol in hand. The girl everyone asks where she got her swimsuit.

Details:

  • Triangle top with halter neck tie
  • Bead hardware detail at center front
  • Butter-cream base with chocolate polka dot print
  • Chocolate trim and binding throughout
  • Boy shorts bottom with low-rise fit
  • Chocolate waistband with front drawstring tie
  • Sold as a set
Size & Fit

Size & Fit:

  • True to size. We recommend wearing your standard size
  • Designed for a snug, supportive fit — size up for more ease
  • Swimwear knit has comfortable stretch with a secure hold
  • Fully adjustable halter ties for a customised fit
  • Triangle top offers light to moderate coverage
  • Boy short bottoms sit low on the hip with a flattering, cheeky cut

Model: Laura wears a size S

Dress Size: AU 8 / US 4
Height: 172cm / 5' 8"
Bust: 84cm / 33"
Waist: 60cm / 23.5"
Hips: 88cm / 34.5"

Fabric & Care

Fabric & Care:

  • 80% Nylon, 20% Elastane
  • Lightweight swimwear knit with four-way stretch, UPF 50+ protection, and chlorine-resistant construction
  • Smooth, soft hand-feel with a subtle matte finish
  • Hand wash cold separately, lay flat in the shade to dry
  • Do not wring, bleach, or tumble dry
  • Rinse thoroughly after each wear to remove chlorine, salt, and sunscreen
  • Store folded flat to preserve elasticity (avoid hanging, which can stretch the fabric)
Shipping & Returns

We aim to process all orders placed before 23:00 on the same day. However, during busy periods, please allow 1–2 business days for your order to be processed.

Shipping Times
Aus / NZ Standard 4 - 8 business days
Aus / NZ Express 3 - 5 business days ( Free Over $100)

US Standard 4 - 9 business days
US Express 3 - 6 business days ( Free Over $100)

Free Express Shipping

Free Express Shipping Aus Wide
Free Express Shipping US Wide

Duties & Taxes
All Duties and Taxes are calculated and paid at checkout

30 day returns
We hope you love your new purchase! If it’s not quite right, don’t worry -  items can be returned within 30 days.

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Testimonials

Trusted by thousands

From the fit to the finish, discover why Sierra Sydney pieces have become an everyday essential.

soo good, not just good for the price either

March 01, 2026

I bought this expecting it to be good for the price, it is actually one of my favorite outfits The detailing is insane up close. Photos do not even do it justice.

Elisa S.

Feels like a $500 outfit

March 10, 2026

I have owned a few higher end dresses and this honestly shocked me. The weight, the finish, the way it sits on my body, it feels expensive.I actually never to take off.

Amelie R.

Love Love Love

Feb 28, 2026

The adjustability is next level. You can get that exact fit where it is snug but still comfortable all day. I also reached out before buying and they answered everything properly, not some copy paste reply.

Shauni De Vos

Thought it was Dior

March 03, 2026

No joke, first time I wore it out, someone asked if it was Dior. The weight, the shine, the way it sits... it does not feel like a cheap alternative at all. It just feels expensive.

Brooke D.

Gigi set looks flawless

Jan 13, 2026

Wore it to multiple events, so my comments on my fit omggg

Noor V.

Got asked if it was a designer

Jan 22, 2026

I wore this to dinner and my friend literally grabbed my body to look closer. She thought it was a designer until I told her otherwise. Insane value for what you pay.

Sofia L.

soo good, not just good for the price either

March 01, 2026

I bought this expecting it to be good for the price, it is actually one of my favorite outfits The detailing is insane up close. Photos do not even do it justice.

Elisa S.

Feels like a $500 outfit

March 10, 2026

I have owned a few higher end dresses and this honestly shocked me. The weight, the finish, the way it sits on my body, it feels expensive.I actually never to take off.

Amelie R.

Love Love Love

Feb 28, 2026

The adjustability is next level. You can get that exact fit where it is snug but still comfortable all day. I also reached out before buying and they answered everything properly, not some copy paste reply.

Shauni De Vos

Thought it was Dior

March 03, 2026

No joke, first time I wore it out, someone asked if it was Dior. The weight, the shine, the way it sits... it does not feel like a cheap alternative at all. It just feels expensive.

Brooke D.

Gigi set looks flawless

Jan 13, 2026

Wore it to multiple events, so my comments on my fit omggg

Noor V.

Got asked if it was a designer

Jan 22, 2026

I wore this to dinner and my friend literally grabbed my body to look closer. She thought it was a designer until I told her otherwise. Insane value for what you pay.

Sofia L.