NUOLUX 4pcs Tambour Embroidery Bamboo Circle Embroidery Cross Stitch Hoop Ring 17 20 23 26cm Material: Natural bamboo. Size: 17cm, 20cm, 23cm, 26cm. Great for working all kinds of crafts from needle arts to fabric painting. Once the project is finished; embellish the edges with lace; paint; gems or other such materials and use it as a display frame.