In excellent conditions, it looks like it was barely used.  Look at the measurements in the photo for best fit.  I can not find the size anywhere.

I believe this is the left side, but I had a couple of nice people messaging me on here saying it is right sided.   It is odd to me that if I wore it on the right side, the logo on the side of the knee would be on the inner leg.  So I'm not quit sure now.  You make your own judgment before you buy.

It looks like a large according to the measurements on the chart.

Please make your own judgment and ask before buying to make sure it fit you.