Quilting Hoops Handcrafted of four layers of birch, put green into a steel mold and kiln dried to prevent warping, After drying, a channel is routed on the outer edge of the hoop.The Buhoogee uses elastic cording and a cleat to gently secure the project to the hoop. All layers of your project are straightened at the same time; no distortion from uneven layers. Both round and square models available in 14" and 16" sizes.