Spacers are metal movable pins inserted in the perimeter holes on our step and repeat boards and contact boards. While most spacers have a top button which is 1/4” round, they are also available with elongated top buttons, as well as special round diameters. The five common spacers are 1/2, 1/4, 1/8th, 1/16th, and 3/16th. Spacers are also available in less common fractions of 1/3, 1/10th, 1/32nds, and 1/64th.