I recently bought a Mystery Ranch Metcalf with a 2017 manufactured date and am wondering about the size. It says 18-21” on the tag, I gather that size range is for the yoke, but what about the waist belt? I don’t see any other tags with waist belt size ranges, I did some google searches and everyone talks about S,M,L waist belts. Does anyone know what waist belt came with the 18-21” yoke?