Daughter's shoe size is between 11.5 and 12. We bought size 29/31 for pool use. Neighbor was concerned about them affecting their above-ground pool liner, but the rubber fin is very soft and flexible. We originally ordered another reputable brand (begins with F and ends with S) in the appropriate size but those had a much larger foot pocket and kept falling off. Further, the other brand has a wider and stiffer fin than the Cressi.Our 6 year old is working on developing a better kick and I don't know that wearing fins is helping her with that...but they help her tread water more effectively so that she needs less rescuing by the adults during water play, and help her propel herself more quickly, so I do feel that they improve her safety. We remove them now and then to help her be less equipment dependent as she improves in her abilities.
Rating:
[5 of 5 Stars!]