Home Sewing Depot 50 Pack - 3/8 Inch Clear Sew on Uv Rings for Shades UV Stable will not become brittle and break from sun exposure. Will not melt even if touched by a hot iron. High abrasion resistance. Suitable for fabric shades, tie backs, etc. Diameter: 3/8 inches Inside Diameter - 5/ 8 inches Outside Diameter Easy to sew on shades and draperies