This set contains the two most popular disc hanger sizes - two 3" and two 4" hangers. Use the 3 inch hangers for plates up to 8" diameter and 3lbs. Use the 4 inch hangers for plates up to 12" diameter and 5.5lbs. These disc hangers come packaged with The Flatirons Disc Company directions and packaging on heavy card stock. The heavy card stock allows for easy wrapping and gifting with decorative plates.