Onairda - mine are tight in the thigh and look similar to yours - I wore them for 3 weeks, and they stretched half an inch (sz32, thigh went from 11.5 to 12), but I don't feel they'll stretch any further, so I decided this evening to sell them.
I think they look ok now, but I don't find them comfortable - mine are also restrictive for me around the whole crotch region too, makes them annoying to move around in, which was the other factor in deciding to sell. So if you don't have that problem and only need under a half inch thigh stretch, then maybe they'll work out…............