Boot Size: L, then XLMy Foot Size: 10-1/2 4E, Men, USHeight/Weight: 6', 250 lbI am wearing this for a badly sprained ankle. It certainly has done the trick for keeping the foot and ankle padded, immobile and protected.SIZING ISSUE:According to the size chart, as a 10-1/2 4E, the large (L) was what I needed, and that's what I got. After wearing it all day, my foot hurt overall in the way one's feet hurt from wearing shoes or boots that are juuuuust a bit too small. I'm embarrassed to say it took me a couple days to realize it was the width. So I ordered the XL, which is what I'm wearing now.The XL is perfect for my double extra-wide Flintstone feet. The hard shell part of the boot goes a good two inches past the end of the padded part, so I just need to be a little careful to not get it hooked on something, but that was also true of the large.Overall fit, Large: the foot part of the padded liner just barely had enough room to velcro the flap in place without it being too tight. After strapping in to the hard shell, the heel was also a hare too tight.Overall fit, XLarge: there is plenty of overlap in the foot flap of the soft liner to get it however snug or loose I need it, and once the liner is on, and I'm strapped in to the hard shell, there is a world of difference. There is a lot more leeway for overall adjustment. On the large, it was so snug overall, I never messed with the inflatable part. On the XL, I have it just slightly inflated, but not even sure that's necessary. The XL is quite comfortable.Summary: Two thumbs up. I'm not a doctor of course, but for sizing it seems better to err on the side of a little big than small, because it won't be long before the whole foot is sore, which stinks on top of a sprained ankle. Also, considering the price compared to getting one from an orthopedist, I'm very, very happy with it.
Rating: [4 of 5 Stars!]