Protected by a utility PATENT, Frogglez Goggles were specifically designed to fit recreational swimmers from 3 to 10 years of age, effectively eliminating the hassles associated with traditional swim goggles. Designed by a parent who was frustrated with regular swim goggles, Frogglez are putting traditional swim goggles in the same category as Beta, tape drives and floppy disks - extinct.Soft, stretchy neoprene straps similar to a wetsuit material glide over hair and secure leak resistant goggles without folding over ears or sliding down the back of the head.Frogglez add an element of style never seen in swim goggles before. Exciting colors and designs make Frogglez Goggles not only easier to use, but fun!Available in 2 sizes to eliminate adjustments.REGULAR size: kids ages 3-5LARGE size: kids ages 5 +You can measure you childs head size if needed. 19 inches or less is REGULAR size.NOTE: The neoprene strap is designed to adapt to most head sizes but will initially need to be stretched for a few seconds all around to adapt to larger heads. Use your hands to stretch 2 inches at a time all around including the side straps before trying on. This will ensure a comfortable fit!