Package Include: You will get 1 sets6 pcsstained glass arch layout frame. They're an easy way to hold round shaped stained glass projects secure as you cut and solder for perfectly shaped panels every time! Size Reference: 6 sizes for you to use(6 pcs Hollowed Arch & Solid Interior Arch). Solid Interior Arch : 5.5x4x0.23inch. About inside diameter: Arch 1: 5.5x4x0.23inch, hole: 3mm; Arch 2: 6.5x5x0.23inch, hole: 3mm; Arch 3: 7.5x6x0.23inch, hole: 3mm; Arch 4: 8.5x7x0.23inch, hole: 3mm; Arch 5: 9.5x8x0.23inch, hole: 3mm; Arch 6: 10.5x9x0.23inch, hole: 3mm. Premium Materials: We use durable MDF wood materials and cutting through precision technology, the frame is sturdy and robust. Holes in the frames allow for tacks or nails to fasten the frame securely to your board. (tacks or nails fasteners not included.) Visual Appeal: The unique design of the arch layout frame creates a wonderful visual effect, making your creations more eye-catching and captivating. While perfectly securing your precious stained glass artwork, it can also protect your glass artwork from damage. Specially for Stained Glass Enthusiasts: Whether you're a new hobbyist or an experienced professional, you'll save time and effort (and frustration) with these perfectly circular frames for stained glass. Use your imagination to create your unique colored glass crafts.