We offer 9 banded sizes that cover over 36 bra sizes, designed specifically for women with DD+ busts. Our bikinis provide the perfect balance of support and style, helping you feel confident and comfortable in every fit. Discover swimwear that truly fits.

To find your perfect fit, please refer to our How To Measure guide.

Our bikinis are designed with a large curved base to provide enhanced support and all-day comfort. We also use thicker-than-average elastic straps to reduce pressure on the neck and shoulders, offering a more secure and comfortable fit for DD+ sizes.

Yes! Our triangle bikinis are engineered for active movement, with secure ties, durable elastic, and a stay-put fit. Whether you're swimming or staying active, you can move with confidence and comfort.

Our bikinis are made from a high-quality blend of 80% Nylon and 20% Elastane, offering excellent durability, stretch, and comfort. All metal components are nickel-free, lead-free, machine washable, and seawater-proof—perfect for long-lasting wear and sensitive skin.

Absolutely! We offer all bikini tops and bottoms separately, so you can mix and match sizes, styles, and colours to create your perfect swimwear combination. Find the fit and look that suits you best.

For best results, we recommend hand-washing your bikini in cold water with mild soap, then laying it flat or hanging it in the shade to dry. While machine-washing on cold is safe, avoid harsh detergents and prolonged sun exposure to help maintain the colour, shape, and quality of your swimwear.

Our premium fabrics are specially designed to resist fading, stretching, and pilling. With proper care - like gentle washing and drying out of direct sunlight - your bikini will maintain its vibrant colour and original shape wear after wear.

We accept Visa, Mastercard, American Express, PayPal, Klarna, and Apple Pay for a smooth checkout experience.

Check your spam/junk folder first.

If you still don’t see it, email us at support@twnnswim.com with your name and order details.

We process orders quickly, but if you need to make changes, email us at support@twnnswim.com within an hour of placing your order and we'll do our best to help you!

Once your order ships, you’ll receive a tracking link via email so you can follow your package’s journey.

Shipping delays can happen due to carrier issues or high demand.

We suggest you check your tracking link, and if you need more help, reach out to support@twnnswim.com.

An item can be deemed lost after the 10th working day from the due date as per Royal Mail's retail compensation policy. In this case please email us at support@twnnswim.com.

We’re so sorry! Email us at support@twnnswim.com with your order number and photos of the issue, and we’ll make it right with a replacement or refund.

We currently ship within the UK and offer international shipping to select countries.

Check our Shipping Information for more details.

For details on shipping and rates please check our Shipping Information.

Yes! We offer free UK shipping on orders over £99.

You can return your order up to 14 days from receiving your order.

We accept returns for unworn, unwashed swimwear with hygiene liners intact.

Please see our Returns Policy for more details.

At this time, we only accept exchanges for faulty or damaged items.

If your item has arrived in this condition, email us at support@twnnswim.com for help.

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We currently do not cover return shipping costs, but we’re working on offering a free return option soon!