Perfect for my needs.I have a decent size arch, mid to high instep, and relatively wide feet. Due to the design it would be really important for others to make sure they get the correct length as the 'lip' at the back of the slipper would likely hurt if a too short length is chosen. Also anybody with a really high instep might not be satisfied with these (my instep on my left foot is slightly larger and I had to manually stretch out that part of the slipper before it was comfortable). On that note . the sandals are actually sized in Euro Sizing, so although the "size" I ordered was labelled 9/10 it probably would be helpful for others if it also listed that a 9/10 = 43 (at least for other users that have experience buying/wearing European manufactured/fitted footwear). Interestingly, at least one site that tells me what a 43 in men's is equivalent to in US sizes reports 43=10 (so go figure why the ordering site called these 9/10).These were replacements for some Reebok shower slippers, the style of which appears to be no longer available --- the one feature on those that these ones from "Vertico" are missing is that there are no holes in the sole to drain water. Since I do NOT use these as shower slippers that does not bother me . but I can imagine it could likely is a major shortcoming for users that are using these 'as labeled' (shower and poolside sandals).