The rulers in this package have 4 different size edges (the top and bottom of each). These fit many of our small melon blocks, even if they don't fit the curves perfectly. They can be used to trim the following Quiltworx patterns: Arizona Cactus, Cactus Flower Table Runner, Broken Daisy Placemats, Geodes, 4th of July, Ombre Table Runners, Milk Thistle, Congo Star, Old Jalopy, Suncatcher Table Toppers, Red River Star, Tarnished Windmill, Tiptides, Skipping Stones, Steampunk Fairytale, Broken Wheel Border, Arctic Star Wall and Queen, Tulip Farm, Cape Cod Garden, Wild Goose Island, Terracotta, Woodcarvers Star, Raindrops, Twinkle Star, Summer Solstice, and more!