I can recommend mediven, which I first bought in Germany last year. When I went to the store for them, they measured my leg in every direction.
Has your doctor said you should have them? Mine are quite tight, a pull to get on and difficult to get off!, and my uk doctor made me have repeat tests just to make sure the condition I had wasn't contra-indicated.
IMHO, and it's just an O, if you don't get tight enough ones, they're a waste of money; if you do get tight enough ones, you have to be sure they're not going to exacerbate a problem.