Sorry for taking so long!
I checked 'em out and I couldn't find a single marking saying what size it is. And, they're a little more worn/dirty than I remembered, with a couple very minor snags, some dirt, and a little scudge in the velcro. I went back and checked the order email (like I said, BPL gear clear), and I didn't see any mention of a size there, either. So, all I've got is the fact that they were too big for my size 9 inov-8 trail runners, and that the top is about 8.5 inches in unstretched circumference and the bottom is somewhere around 18.5 (the bottom is harder to measure). Also, at the velcro it's exactly 7 inches high.
yours for $20 shipped because of the wear, and because I'll never ever use them due to the size. PM me if you're still interested. =)