Ah, that explains why I have a pair of 40s but tried on a pair of 40s at the store and they were huge. I tried on all the various sizes they had of that particular model and none of them fit. They all had tiny little toes I could barely squeeze my toes into and none had a foot part that fit. The ones I have are definitely ladies but the toes are so long they are almost too long. I figured their sizes must be totally all over the place and unreliable.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 157.5 x 2