Check out this high quality replacement strap for your Fitbit Ace 3 - really handy to have at an alternative location like your workplace or with your gym bag.

Material: High Quality Silicone
Buckle: Standard Buckle
Sizes:
Large:
- Total Length including watch face: 242mm (125mm 80mm 37mm Watch Face)
- Fits Wrist: 165mm-230mm

Small:
- Total Length including watch face: 217mm (100mm 80mm 37mm Watch Face)
- Fits Wrist: 152mm-207mm

These are not manufactured by Fitbit but are fully compatible with the Fitbit Ace 3