I voted "other." I have an older model Oceanika Merfin I purchased used. It says it fits size US 7-9, but the foot pockets are extraordinarily tight. I might size up to the medium in the Mahina Merfin which is supposed to fit US 8.5-10.5. I have been working on trying to stretch the foot pockets by wearing thick neoprene with it, and it has helped some. So far I am please with it and got a very nice tail made for it on Etsy for a really reasonable price. I'll post pictures of the tail once I have better ones then in my messy living room!