Arrived in 2 days!!!
I am a perfect size 7 and after reading all the reviews I ordered a 6.5 M, it fits well, however still feels like it could be a 1/2 size smaller, I wish I went with a full size smaller, the calf 14 and 1/4 fits very snug, I am a 14&1/4 inches.
I am hoping it will stretch a bit, I have extended the buckle to the second hole. But all in all, I am not returning this boot because I love it too much. I tried it in a store at the mall and found that size 7 store boot fits perfectly, I then measured the bottom of the sole and found it to be the same 10'5 inches as the boot I received at 6.5 M size.
A word of warning, this boot looks on your foot like a whole inch longer, not qute clown feet but it's way longer then my rubber boots and any other flat boots that I have, this is because of the way that the sole is attached to the boot (stitching on the outside), so don't despair when you receive it and it's seems so much longer then your actual foot.

By the way this boot is WATER AND WEATHER PROOF!!!! I wish this was mentioned in the description, I would buy it WAY more willingly!!!