This template was designed with slots leading into each circle so that the hopping foot of the longarm fits in neatly. The circles sizes are 1/2 inch, 3/4 inch, 1 inch & 1 1/2 inch. Packaging includes instructions for use, safety tips and design ideas. Made from .1/4 inch thick quality acrylic. Use on your Handi Quilter long-arm machine with the suitable HQ Ruler Base, or with the table overlay on your Sweet Sixteen.