Secret Surf Bikini Bottom in Black
Details
Discover the Secret, the ultimate low-waist surf bikini bottom designed for female surfers who want style without sacrificing performance. Featuring a flattering low-waisted cut and higher, rounded butt lines, this surf bikini bottom delivers optimal comfort and a figure-enhancing silhouette that moves with you through every wave.
How to Wear It:
The Secret surf bikini bottom pairs beautifully with our Nias Bikini Top and Savu Bikini Top for a complete, coordinated look. Mix and match to create your perfect surf-ready combination that transitions effortlessly from lineup to beach.
- Low-waist design with higher, rounded butt lines for a flattering, feminine fit
- Optimal comfort and freedom of movement for active surfing
- Strikes the perfect balance between classic style and sporty performance
- Premium Econyl® lycra made from recycled ocean plastic
- Supports ocean preservation with every wear
It features a strong elastic band around the hips. We recommend double-checking the size chart, and if you're unsure, feel free to contact us for assistance.
Size chart EUROPE
| Size Europe Chart | XS | S | M | L | XL | XXL |
| Chest (CM) | 77-79 | 82-85 | 87-94 | 95-99 | 100-104 | 104-107 |
| Waist (CM) | 59-61 | 64-70 | 71-76 | 77-81 | 82-85 | 86-89 |
| Hips (CM) | 84-89 | 89-93 | 96-101 | 101-105 | 105-109 | 105-120 |
| Height (CM) | 147-165 | 165-175 | 167-177 | 168-180 | 169-180 | 169-180 |
| Weight (KG) | 41-45 | 45-54 | 54-61 | 61-70 | 71-74 | 75-82 |
| US size | 0/2 | 2/4 | 6/8 | 10 | 12 | 14 |
| AUS size | 4/6 | 8/10 | 10/12 | 12/14 | 14 | 16 |
Size chart USA Ninefoot
| Size USA Chart | XS | S | M | L | XL | XXL |
| Chest (inch) | 30-32 | 32-34 | 34-37 | 37-39 | 39-41 | 41-43 |
| Waist (inch) | 23-24 | 25-27 | 27-30 | 30-33 | 33-34 | 34-35 |
| Hips (inch) | 33-35 | 35-37 | 37-40 | 40-42 | 42-44 | 44-47 |
| Height (feet) | 4'9"-5'5" | 5'2"-5'5" | 5'5"-5'7" | 5'6"-5'11" | 5'6"-5'11" | 5'6"-5'11" |
| Weight (pounds) | 90lb-108lb | 108lb-119lb | 119lb-134lb | 134lb-154lb | 154lb-163lb | 163lb-180lb |
| US size | 2/4 | 4/6 | 6/8 | 10 | 12 | 14 |
| AUS size | 4/8 | 8/10 | 10/12 | 12/14 | 14 | 16 |
How to Take Your Measurements?

Bust: Measure around the fullest part of your bust, keeping the tape level and comfortable—not too tight.
Waist:
Measure the narrowest part of your waist, a few centimeters above your belly button. Keep the tape snug but not tight.
Hips:
Measure around the widest part of your hips, about 20 cm below the waist, ensuring the tape is horizontal.
- Premium Econyl® lycra fabric
- Low-waisted construction
- Higher, rounded butt line design
- Sustainable recycled ocean plastic materials
- Surf-tested durability
- Quick-drying performance fabric
We know buying online can sometimes be challenging.
If you need help choosing the right size, click the chat icon in the corner of the website, and our team will gladly assist you with the size chart.
Returns and exchanges are only accepted from Indonesia, the United States, and Europe, where Ninefoot Studio provides local return addresses. Unfortunately, we cannot accept returns from other countries.
We accept returns for store credit or exchange if the garment(s) are returned in original, unmarked condition with all tags and hygienic liners attached. Please take care when trying on your items—especially lighter colors—and ensure that all makeup, sunscreen, deodorant, creams, and sweat are removed before trying them on.
For full details, please review our complete Refund Policy.
All returns and exchanges must include a valid tracking number. Returns sent without tracking information cannot be processed.
Customs & Import Taxes: International orders may be subject to customs duties or import taxes determined by your country. These charges are the responsibility of the customer and orders cannot be returned due to customs fees. U.S. orders ship domestically and do not incur import taxes.
✱ All sale items are final sale. No exchanges, returns, or store credits will be accepted on sale items. ✱