Large quantity: Each button is 21mm, large and well made. Hand sewing is easy and very stable, which is what some of your sewing projects require. The sewing button is very suitable for your design. Buttons of the same size can be easily replaced, and you will never worry about missing parts, which is enough to meet your different needs High-quality material: The buttons used for clothes are made of high-quality copper and high-quality springs, with appropriate elasticity. The buttons are hard, robust and durable. It can be used for a long time and is not susceptible to erosion and rust. Convenient for you to use in daily life Easy to use: Each push button consists of two parts. A side notch on the base tool is used to secure the cover to the snap lock and prevent the cup-shaped cover. The other side projection on the base is used to secure the rivet to the snap fastener and prevent it from hitting, bending and sliding, making it very easy to install. These two pieces can be clipped together and used as fasteners for any sewing project Widely used: These buttons are widely used in clothes, coats, hats, baby, jeans, down jackets, shoes, jackets, cargo pants, windbreakers, backpacks, bibs, embroidered towels, leather crafts, DIY or other sewing and home projects Note: The data are all manual measurements, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object receivedDelivery quantity: (according to the main picture)"