Just a question for the wise magi of this forum:

I'm new to SRP and i don't have a str8 or strop yet. I am looking into piecing together some stuff. I just want to be informed before I rush out and end up buying some piece of junk.
I was looking at all sorts of strops, and I was wondering what is the difference between a 2", 2 1/2" or 3"? Is it just a personal preference, or does the extra width provide an advantage? Since I am broke as a joke, I guess I was looking to see if the extra money to buy a wider strop is worth it.
I already have multiple raging ADs so I can't wait until I do make that first purchase to get me started--who knew a piece of steel could be so fascinating?