Absolute Support sizes by shoe size. I weigh 300 lbs with lg calves. I want the foot to fit, but then will the leg part be way too tight? My calves circumferences are 17 1/2 inches.

Unfortunately, I would place you in an item that goes by measurements and not by shoe size because it could fit you in the foot area but not in your calf. Try A201BL5. This item gives you the features of an extra-wide calf, and it also goes up to a 5XL.
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