Karma Onepiece - Siren
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CUTE & CLASSIC
Our classic design, with cross-back straps & high cut legs for the ultimate speed-efficient swimsuit. All of our Karma® swimsuits are sustainably made using recycled yarn & ocean plastic.
Features
Features
Shipping
Shipping
We offer free standard shipping on all UK orders.
For international orders, we offer Standard International Shipping (Tracked) or DHL Express. Rates will be calculated at checkout!
How does it fit?
How does it fit?
Care Instructions
Care Instructions
Wash by hand or separately on a cold cycle. Do not tumble dry or iron!
How was this made?
How was this made?
Our fabric is created from regenerated ocean waste, such as abandoned fishing nets and industrial plastic. As well as being a solution on waste, our recycled fabric reduces the global warming impact of nylon by up to 90% compared with the material from oil.





Sizing Chart
All measurements are in centimetres
XS | S | M | L | XL | |
UK/AUS | 6 (28) | 8 (30) | 10 (32) | 12 (34) | 14 (36) |
US |
2 | 4 | 6 | 8 | 10 |
EU |
34 | 36 | 38 | 40 | 42 |
Torso | 140-145 | 145-150 | 150-154 | 154-159 | 159-164 |
Bust | 78-83 | 83-88 | 88-94 | 94-99 | 99-104 |
Waist | 58-63 | 63-68 | 68-74 | 74-79 | 79-84 |
Hips | 86-91 | 91-96 | 96-102 | 102-107 | 107-112 |
HOW TO MEASURE

Torso: Measure from the top of one shoulder, over the fullest part of the bust, through your legs and back up to where you started.
Bust: Measure around the fullest part of your bust.
Waist: Measure around the smallest part of your waist.
Hips: Measure around the widest part of your hips.
FAQs
Do you ship to my country?
Yes! We ship worldwide, and you'll be able to track your order to your door.
How can I contact you?
We're here to help, just send us an email at support@instantswimwear.com, or use the chat box!
How much is shipping?
We offer free shipping for all UK orders. For international orders, rates will be calculated at checkout.
How do I find my size?
Please check our size chart above to find your size, or feel free to contact us so we can help you find your perfect fit. Orders can be exchanged if they don't fit quite right!