Natural Abalone Shell Buttons: These buttons are made of abalone shell with unique natural texture and luster creating different visual effects with the changing angle and intensity of light adding a touch of elegance and mystery 2 Sizes: Package includes 2 different sizes of abalone shell buttons 15x2.5 mm hole: 3 mm 19x2 mm hole: 2 mm 10pcs/size total 20pcs. enough for your daily different design needs and replacements Well Made: These abalone shell buttons are sturdy and durable enough to withstand daily wear and use without breaking easily and the 4-hole design makes the buttons more secure when sewn onto clothing or other fabrics Easy to match: It can be used in combination with other decorative elements such as pearls ribbons beads etc. to create a richer and more varied decorative effect with its embellishments to make your crafts more eye-catching Widely Used: Abalone shell buttons are great for a variety of sewing embroidery and knitting projects and can be used for shirts jackets skirts pants hats blankets cushions and more as well as for jewelry crafting or home decor