So I live in a small town in California by the name of Merced. Fixies do not exist here, but after living in San Francisco for a while, I've started building up a fixie of my own and I've decided to try out risers. Problem is, I have no clue of what's considered a pair of "good" risers.

I do a lot of riding, but also enjoy tricking. My bike is a 52cm (I'm short) and I'm looking for a handle bar length that'll look nicely on a 52cm frame. I have no clue what they mean by 31.8W or 200mm or whatever.

I'm not sure what kind of grips are compatible with what and if all the bars have different thickness or whatever. Please help! I just really need some advices on what's going to be a suitable pair of risers. Examples please?