For your consideration, here is a Vintage Brass Round Number 5 Key or Tool Metal Tag.  The 5 is just on one side.  It has a diameter of 1 1/2 inches.  It has some wear and tarnish on it.  It will be mailed in a bubble mailer with foam core stiffeners.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (490.56w-.4bx1)