12 DIFFERENT RADIUS CIRCLES- With 12 half circle radii ranging from 1/2 inch to 3 3/4 inches. There is also a conversion for diameters, from 1 Inch to 7 1/2 Inches. This circle template is perfect for geometry, drawing, plans, and sketches. 36 PERFECT CIRCLES- This template has 36 perfect circles measuring from 3/64ths to 1 Inch This timely template is the ideal drafting template for any drafter, architect, engineer, artist, or planner. MADE OF HIGH QUALITY PLASTIC - The translucent see through green plastic makes it easy to create your exact shape without drawing in the wrong place. It's convenient size makes it the perfect travel template for any professional or student. works on many surfaces including paper, vellum, fabric, canvas, wood, and mylar. THE PERFECT GIFT - Gift this shape stencil to the artist in your life. Give them a practical, memorable gift that will further their creativity to the next level. About the lettering guide: The Pacific Arc Template Guides are the ideal perfect circle guide for geometry, drawing, plans, and sketches. Made of a strong translucent green plastic, these templates are perfect for use on any surface and will not obscure the surface you are working on. Available in different styles for landscaping, architecture, plumbing, lettering, electrical, and circles.