Koolsun Flex sunglasses simply offer the best fit and design for your baby, it has a removable buckle strap that can keep it from falling off the face of your baby by simply adjusting the back strap for a perfect fit for your baby. This is very comfortable and will not cause any marks on your baby's head. Besides giving protection to your baby's eyes, this is also a fashion statement. The frame and temples are made of durable, elastic and strong TPE. The buckle is in white aqua colour with a matte finish, the strap is light grey. Also, the silver mirror lenses are made of strong polycarbonate that cannot break. Protect from harmful UV-A and UV-B radiation. In case a lens gets scratched accidentally, no worries, as the UV-A and UV-B filters are built into the lens and are not in a film on the outside of the lens. As a result, your baby's eyes are 100 percent protected even when lenses are scratched. Suitable for age 3-6 years kids. Specification: Lens Width: 47 mm. Lenses Height: 33 mm. Nose Bridge Width: 16 mm. Temple Length: 105 mm. Maximum Inner Width: 115 mm.