Timely T-81 circle drafting template offers 36 circles from 1/32 to 1-1/8 diameter. Permanent pin-point centering. Circle Swinger feature is a series of .046 pin holes which can be used to draw much larger circles, all the way to 14-3/8 in. diameter. Increments of 1/8" diameter are obtained by using different centers. Works with pencil or fine ball-point pen. Green plastic stencil size: 3.875 x 7.75 x .030 inches. Timely circle templates are quality-made in the USA.