These prong buttons are sufficient for thinner sewing fabrics but not intended for use with thick or dense fabrics. Thin or stretchy fabric like knits and jersey must be reinforced with sturdier material around the area of snaps to avoid ripping. Features - Color: White. - Material: Copper. - Size: 0.9 x 0.9 x 0.2cm. - The package includes 20 sets of prong buttons, and each set oncludes 4pcs prong buttons. - Suitable used in the thin fabric. - Uses: Home repair, clothing store spare, cross-border electricity supplier AliExpress online sales, join the clothing store, etc. - for crafting dummy clips, bandana bibs, baby grows, key rings etc. - Great supplies for handmade crafting and sewing and fixing. 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.