Its funny but I haven't noticed sizes getting bigger in fact in some stores they've gotten smaller. I think its a more American phenomenon since Americans are getting larger at a faster rate then Canadians. I'm sure it will trickle down here eventually but that tends to take time. Although there are some more plus sized womens stores lately but there all pretty high end. Plus I know one thing that affecting Canadian sizing is how exponentualy the Asian population has jumped in the last twenty years, we've got a minority majority in quite a few places now. Since they are smaller on average some brand are changing to attract their business. Its also part of why are obesity rates are climbing slower than the US. (That and better food quality and access. Canadians are several times more likely to live near a farm than Americans, unless you live in the North)

Ugh what I really hate is when clothes are supposed to be a bigger size but only one part of the garment is actually bigger. I don't know how many times I've not fit the medium gone back for the large and found out it fits exactly the same through the shoulders as the medium did. Its just stores being cheap they only actually make the shirt longer and don't bother with the sleeves. My favourite brand is my favourite mostly cuz the clothing size covers a good range(they go from 00 to XXL) even if it is slightly more expensive.