Marbles Pin-On Compass 1in. Diameter. With a brass body the Marbles Pin-On Compass will provide you with many years of reliable and efficient service. Thanks to the 1 1/8in diameter the Marbles Pin On Compass will not get in your way. Features of Marbles Compass - Pin-On: 1/8" diameter Brass body Fastens to clothing Reproduction of original Marbles compass Package Contents: Marbles Pin-On Compass MR1141 Marbles MR1141: Pin-On Compass 1in. Diameter