Determine Bike Size Kids

Anyone want to help me determine what “size” I am for a road bike?

I am searching for a road bike and really don’t know all too much about them, I have looked for some on craigslist just cause I’m a kid and want to get a rather cheap one, but still decent, 1000ish area. at any rate, i was wondering since i am 5’6, 5’7 what number cm I should be looking for like 54, or 56 something like that? Thanks, and this might be a really stupid question don’t really know. Thanks again

At your height you will be looking at a 54 or a 56 just as you said. It is best to always buy from a bike store as professionals in store will be ale to fit you to than bike with how high the seat should be and how far back or forward it should be. Finally it is not a stupid question you have done the right thing and I hope you have fun.

De Anza Cycle Park Hillclimb 1974