To get an even seam, it has to go end to end. I don't have any pictures, but I believe on the left I cut a wedge taking about 3.5 inches off the bottom ,and about an inch off the top. That was just to get it to match the right thigh.
A tailor's measuring tape is the best 2 bucks spent when fitting thighs. The you can get the thighs even and tapered very easily.