I’ve given up, for the most part. There are a couple brands, like Abercrombie and Hysteric Glamour, which carry precisely my size (their cut model must happen to be the same size and shape as me), but other than that, I only rarely buy pret-a-porte clothes at a regular outlet anymore. It’s more logical to either 1) get a few good dresses / suits / shirts tailored and use that as your main wardrobe, or 2) if you find something you like which is sold pret-a-porte but not your size, buy it a size or two up and then go get it tailored. Sizing is painfully unreliable, especially when trying to order online.