"With this ring, it allows me to be stylish and funky with the patterns. The colour and texture is versatile. Easy to put on change anytime. A good addition to change."
"Great quality and feel. I have peace of mind it won't get scratched up when I'm working out at the gym. Thank you!"
Flexible for everyday wear.
Flexible silicone offers a lightweight alternative to a metal band. A ring is not protective equipment; remove jewellery whenever your activity or workplace requires it.
Almost weightless
Flexible silicone has a soft, lightweight feel. Choose a comfortable fit and remove the ring if you notice irritation.
Choose when to wear it
Silicone rings can catch or tear. They do not guarantee protection from injury. Follow workplace, machinery and activity rules, including removing all rings where required.
Days warranty
Silicone doesn't last a lifetime and we won't pretend it does. 30-day replacement warranty on tears, splits, or manufacturing defects. After that, swap it for a fresh one — they're built to be replaceable.
Every ring arrives ready.
- Branded pouchSlim Helix pouch — toss it in the gym bag or glovebox.
- Online fit guideSilicone is flexible — measure at home with a string or paper strip, our guide walks you through it in two minutes.
- 30-day warrantyTears, splits, or manufacturing defects in the first 30 days — we replace it.
- Free exchange*First size exchange has no exchange fee on eligible rings priced $90 or more; $10 under $90 or for a second exchange. Sale exclusions apply. Return postage is your responsibility.
The specs.
- Material
- Silicone
- Width
- 9mm
- Colour
- Black
- Available sizes
- 7 / N.5 – 14 / Z+3
- Model
- SIR056-HOLLOW-BLACK
Not sure of your size?
Silicone is flexible — but the right size makes a real difference for comfort. Three ways to check before you order.
The details.
The Hollow Square Black silicone ring combines a bold squared profile with hollow construction in an all-black finish, clean, tough, and purpose-built for active men. Made from medical-grade silicone, it is sweat-proof, waterproof, and non-conductive, safe for the gym, tools, or water. The angular exterior gives a strong, industrial look while hollow channels reduce overall weight. Silicone rings break away under extreme pressure, protecting your finger in situations where a metal ring could become dangerous. The most versatile option in the Hollow Square range.
What 2 owners actually say.
Average rating 5.0 / 5 across 2 verified reviews.
Customer reviews
Stylish and funky
With this ring, it allows me to be stylish and funky with the patterns. The colour and texture is versatile. Easy to put on change anytime. A good addition to change.
Exactly how I expected it to be!
Great quality and feel. I have peace of mind it won't get scratched up when I'm working out at the gym. Thank you!
Ring size guide.
Measure the inside diameter of a ring that already fits. Print the chart 100% scale or use a tape to check inner circumference.
| AU / UK | US | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| G | 3½ | 14.1 | 44.2 |
| H | 4 | 14.5 | 45.5 |
| I | 4½ | 14.9 | 46.8 |
| J | 5 | 15.3 | 48.0 |
| K | 5½ | 15.7 | 49.3 |
| L | 6 | 16.1 | 50.6 |
| M | 6½ | 16.5 | 51.9 |
| N | 7 | 16.9 | 53.1 |
| O | 7½ | 17.3 | 54.4 |
| P | 8 | 17.7 | 55.7 |
| Q | 8½ | 18.2 | 57.0 |
| R | 9 | 18.6 | 58.3 |
| S | 9½ | 19.0 | 59.5 |
| T | 10 | 19.4 | 60.8 |
| U | 10½ | 19.8 | 62.1 |
| V | 11 | 20.2 | 63.4 |
| W | 11½ | 20.6 | 64.6 |
| X | 12 | 21.0 | 65.9 |
| Y | 12½ | 21.4 | 67.2 |
| Z | 13 | 21.8 | 68.5 |