Assuming you're talking clothing, I've dealt with the following companies (just make sure they don't use UPS for shipping as it can be a big shock at how much they charge for customs clearance):
I was sure there was one for Canada, but I'll double check them and get back to you. Hope some of these help.
Added: Better Half I think was the one in Canada, but it looks like the website is under construction (never a good sign). Oh, for all of the above it's just the company name (no spaces) .com The exception is newport-news (there's always one, isn't there).