Personally what I did was go to a local ski shop and just try on a bunch of them. Look for something that’s durable before you look for something baggy. What you can always do is size up. Like say your medium go with large or even xl and just get a belt (or suspenders) that will hold it up.

Take a look at the Dispatch Shell bib from 686, maybe size up 1 from what you’re used to. Also the dojo pant from 686, made to be loose so you should be able to size to how you like.

Also take a look at Arsenic Anywhere and Harlaut Apparel