You don’t need the original pins to size new ones. However, if you post the model and year / serial of your guitar perhaps someone here can show you the style of the pins that may have been used originally.Thanks, all. I have never tried Bob Colosi's pins. Maybe it's time I do. I don't mind spending the $$$ for this guitar.
Mikey, I hear what you are saying, but I don't have the original Guild pins to measure. I think the ones that it came with are aftermarket Martin rosewood pins.