Actually- here's something interesting, and I'm really ticked about it. I never had chafing/ sore trouble 'till I atarted the comeback in earnest recently. While I was down and out I put on weight, a lot of it, and I had to break down and buy shorts in a W size. There, it's out. I finally sucked it up and spent some money on top of the line goods I hope not to get to wear out. It's an investment in getting my real body back, right? Except I have this accelerating chafing on my tush, not so bad at spin but yesterday I only lasted twenty minutes on the bike I was in such pain, had to go home and put lidocaine on my sit bone places- I'm sitting on the chamois seam. So I got out prewreckage shorts I loved in a size L and new shorts in a 16W, like 3 or 4 sizes apart, and measured. Why is the chamois in the fat shorts smaller than the one in the buff goddess shorts? Same brand. No wonder I hurt! I measured every pair I own, (found a jersey that fits!) and all the L's have inches more pad up the back. Shouldn't the bigger butt have the bigger chamois? I'm ticked, how am I going to ride it off like this? At eighty bucks a pop this is inexcusable!
Another interesting tidbit- fave high milage shorts from the day have a triangular pad with rounded corners that give LOTS of sitbone coverage. The ones that don't impress as much are oval shaped. Good to know.
So I'm taking a ruler shopping and hedge my bets. When I was thinner, I wondered why big people didn't just get some exercise. Even when you're big, I've found that muscle tone really makes you look better and life is easier. Now I know- we can't find decent stuff to wear.

Lizzy, very grouchy from a sore tushy