Finally decided to post something about this. I've realized that - after putting shorts, jeans, underwear, etc... on, that my left leg is a tighter fit than my right leg. I've noticed this for a looooong time. Just today I decided to take a measurement. So, my left quad is a half INCH larger than my right! Out of curiosity I measured my calves. RIGHT calf is about a half inch larger than my left!!??? What the heck is going on??? I know I should probably find a physical therapist to ask this question, just figured I'd see if anyone here has any history with this. My right leg definitely has more knee problems by the way. I've also noticed that when I stand, I sometimes favor my left leg/use my left leg more than my right. I know our bodies aren't perfectly symmetrical, but I'm afraid mine is worse than normal. I'm right handed, so I don't know if that makes it any more interesting. One would think a right hander has a more dominant right leg than left leg?

1/2 INCH in circumference is pretty inconsequential IMO. As far as left light dominance, check this: Footedness - Wikipedia, the free encyclopedia

I wonder if your back is out of alignment and your leg muscles are compensating for the difference?
When I first went to the chiropractor, he had me stand with one foot on each of two scales. My weight was distributed differently and it was quite noticeable on the scales.

I wouldn't be surprised at all if my back is out of alignment. I've had lower lumbar surgery for a herniated disc back when I was a kid. Have had lots of chiropractic appointments to help things straighten out as well. I haven't been to one for a while. Probably over due.