I don't think they come in sizes, at least the ones from Nashbar don't. There were other European ones out there that were available in a size or two at one time but I couldn't find anyone that imported them. As far as the width, yea they are a little wider than I feel would be perfect but they're not too wide, YMMV, and they are really stable, when your hands on the sides, like driving a bus, which is really nice when you are bombing a big hill fully loaded. I feel far more secure and rock solid than say my road bikes with 44 cm drops in said conditions.