The product is made of durable and plastic. Plastic embroidery hoops have an upgraded adjustable screw that you can use much more easier. It is not only for embroidery, needlecraft, and quilting you can also make the decorations on the walls. Features   - ColorAssorted Color - Material: Plastic. - Size: 1pc inner dia 7cm, 1pc inner dia 9cm, 1pc inner dia 12cm, 1pc inner dia 15cm, 1pc inner dia 21cm. - Plastic embroidery hoops have an upgraded adjustable screw that you can use much more easier. - Cross stitch hoops are made of durable and plastic. - Unique design: The nut is connected with the outer ring to prevent the loss of screws. - Not only for embroidery, needlecraft, and quilting you can also make the decorations on the walls. - choice for embroidery lovers, good set for kids to start embroidery. Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 5 x Embroidery Hoops