●Watch belt width: 2 cm (20 mm). The longest side of the watch belt: 10.7 cm (107 mm). Shortest side of the strap: 7.6 cm (76 mm). ●Choose the right width: compatible with any child watch that uses 20 mm. It is important that the strap width of your watch corresponds exactly to the width of the strap. ●Multiple options: our watch strap has 3 colours to choose from, please choose according to the colour of your watch. ●High Quality Material This watch strap is super soft and wear-resistant. It is made of environmentally friendly silicone material, odourless, harmless, soft and durable, and can be used safely by children. ●Customer Service:Our human service is online 24 hours a day. If you have any questions after purchasing one of our products, you can ask them by email.