1. Yes, I have 32 saga boardshorts and jiberish boardshorts size 32 and they both fit basicly the same like most brands.
2. The material isnt realy like the waffles or like the jackets, its just like the standard boardshort material, maybe a little thicker and higher quality.
3. No, I do not think its possible to strech them whatsoever.
4. I think they will go with anything.