Our WELLY rubber boots will keep your little one's toesies dry throughout the rainy days Made in 100% natural rubber Cleaning instructions: Make sure to clean your boots with a mild soap before conditioning, especially if there is visible dirt and mud on them. This will allow the conditioner to reach the rubber Use a wet rag or sponge to clean the entire exterior of your boots WARNINGS: Children must be supervised when playing around water. Do not leave your child unattended Measurements: Str. 21 - 139 mm. Str. 22 - 145 mm. Str. 23 - 152 mm. Str. 24 - 157 mm. Str. 25 - 167 mm. Str. 26 - 172 mm. Str. 27 - 178 mm. Str. 28 - 189 mm. Str. 29 - 197 mm. Str. 30 - 200 mm. Str. 31 - 205 mm. Str. 32 - 211 mm. Str. 33 - 218 mm. Str. 34 - 224 mm. Str. 35 - 230 mm.