Now granted, I’m a tall and wide woman, and as a rule wear a 2X size. To hedge my bets, when I ordered this set last year, I ordered a 4X. I don’t think they would have fit if they came in a 10X. I ended up giving them to a person who wears a large, and the set was snug on her. Save your money
With this brand, only the leggings and knee high socks are actual American sizes. The bras are hit and miss. Success for me, but others have had trouble.
My wife is a size 8 and buys these in medium. Hope this helps,
Thanks for the heads-up. Glad I checked the comments before buying.