Mixed Size Pack, CLASSIC WELLIES, Navy, Set of, 5 Pairs

Please advise which sizes are required when ordering mixed size packs.
These classic wellies will keep feet clean and dry whatever the weather. The tall design will protect more of the leg meaning less messy clothes to deal with. They have a special tread-grip underfoot to keep Muddy Pups on their feet! The lining is 100% nylon.