Frank & Oak ships a box full of men's clothing in Canada every season and you return what you don't want. I used to do this before just getting bespoke suits/shirts made. Rogue Territory denim in LA also has a good return policy and free hemming/repairs if you pay return shipping.

I've only been hosed trying to return broken fitness equip from Amazon, since I didn't bother reading the fine print about only allowing US domestic customer returns