I've got small feet (women's size 7). I had a difficult time finding booties to fit. The ones that fit my foot I wasn't able to zip up and have the zip stay up even though my ankles are t fat! Finally went with a Seasoft Sunspray as it's just above ankle height. Very comfortable. I like the extra support and the ridge on the heel keeps my fins on. I have Hollis F2 fins.