The Poppy Stamps Simple Rings Dies are versatile crafting tools made from durable steel, compatible with most die-cutting machines. You can use these dies on a variety of materials, including cardstock, felt, fabric, and shrink plastic, allowing you to cut, stencil, emboss, and create a wide range of projects. This set includes 5 dies, which have been detabbed and conveniently mounted on a magnetic sheet for easy storage. The sizes of the dies are approximately 3.6 x 3.6, 3.1 x 3.1, 2.6 x 2.6, 2.1 x 2.1, and 1.6 x 1.6 inches. These circle dies are perfect for nesting different colors or for creating layered designs. They work well with Snowglobe Bases Dies 2578, adding even more creative possibilities to your projects.