fatshionista

In a lot of their items that are fitted that's true. In tees and jersey stretch items it's usually not as bad. I own a 9th Doctor stretch jersey dress in XXL that fits my size 20 top and size 22 hips just fine, though the next size up was what was recommended by my measurements. I think an 18 would fit the 5x, though if it's dresses you're looking at (like that cloud city one) they're made smaller busted from what I've read.

Torrid occasionally carries their designs in more true to size cuts too.