ORDER BY 3.30PM WEEKDAYS FOR SAME-DAY DESPATCH
DISCREET PACKAGING
EXPRESS DELIVERY AVAILABLE IN THE UK
ORDER BY 3.30PM WEEKDAYS FOR SAME-DAY DESPATCH
DISCREET PACKAGING
EXPRESS DELIVERY AVAILABLE IN THE UK
Designed to enhance the body with ultimate support and comfort, the body measurements outlined in the size guide below is to help you find your perfect Sea Level Swimsuit.
Measurements (inches)
| Size | XS (UK 8) | S (UK 10) | M (UK 12) | L (UK 14) | XL (UK 16) |
| Bust | 33" | 34" | 36" | 38" | 40" |
| Underbust | 28" | 29" | 31" | 33" | 35" |
| Waist | 25" | 26" | 28" | 30" | 32" |
| Hip | 37" | 38" | 40" | 42" | 44" |
International Sizing Conversions
| International | XS (UK 8) | S (UK 10) | M (UK 12) | L (UK 14) | XL (UK 16) |
| UK | 8 | 10 | 12 | 14 | 16 |
| US | 4 | 6 | 8 | 10 | 12 |
| Australian | 8 | 10 | 12 | 14 | 16 |
| European | 34 | 36 | 38 | 40 | 42 |
| French | 36 | 38 | 40 | 42 | 44 |
Please note: We find Sea Level bikini bottoms run small, so we recommend choosing one size larger than your normal size for the best fit.
Same-day despatch
Order by 3.30pm Monday–Friday
Discreet packaging
Discreetly wrapped, always
30-day returns
Returns accepted within 30 days
Complimentary delivery
Free UK delivery over £80
Experience luxury and sophistication with the Spinnaker High Waist Bikini Bottom. Made with an elevated textured rib fabric that's sleek and soft, it fits like a second skin for ultimate comfort. With moderate bottom coverage and power mesh lining for front and back support, it's the perfect summer staple.
• Designed by Australian swimwear brand Sea Level.
• Bikini brief in white.
• Textured rib.
• High-waisted.
• Powermesh lining for front & back support.
• Moderate bottom coverage.
• Composition: 84% polyester, 16% elastane.
Same-Day Despatch: Order by 3:30 PM (UK Time), Monday to Friday, for same-day despatch via Royal Mail.
Orders placed after 3:30 PM Monday to Friday, or on weekends and UK public holidays, will be processed the following working day.
All orders are dispatched in plain, unbranded outer packaging.
| Delivery Service | Delivery Aim | Price |
| Royal Mail Tracked 48 | 2-3 working days | £3.00 (FREE over £80.00) |
| Royal Mail Tracked 24 | 1-2 working days | £4.00 |
| Royal Mail Special Delivery | Next working day | £8.00 |
Please note: Timescales provided are delivery aims.
USA (Delivered Duties Paid): Royal Mail Tracked ($19.00 USD). Note: Maximum basket value is $800 USD per order.
Other International: Royal Mail Tracked or DHL Express Worldwide. Prices are calculated at checkout based on location and volume.
EU Delivery: Please note we are not currently shipping to the EU.
UK Orders: All orders shipped within the UK include UK VAT, charged by NK Retail Group Ltd.
USA Orders: US orders are shipped Delivered Duties Paid (DDP). You will not face any additional customs charges upon delivery.
Other International Orders: For all other international destinations, customers are responsible for any local import taxes, duties, and customs clearance fees. Please check your local customs regulations before placing an order, as NK Retail Group Ltd is not responsible for these additional charges.
Delivery times vary by destination. The following are estimated guides from the date of despatch:
UK Delivery: Please refer to the UK service options above.
Worldwide Delivery: Typically a 5–10 working day aim.
Please note: Timings are estimates and subject to change. International deliveries are occasionally subject to unforeseen customs clearance or payment verification delays.
Every product and size listed online is physically held in stock. On the rare occasion of an inventory discrepancy, our team will notify you immediately by email.
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