7.5 - 30mm Black and White Plastic Mushroom Buttons with Shanks for Sewing7. 5 30mm Black and White Plastic Mushroom Buttons with Shanks for Sewing These plastic buttons range in size from 7. 5mm to 30mm and are designed in the shape of mushrooms, available in classic black and white. They come with shanks, making them suitable for various sewing projects. The buttons are crafted from durable plastic, ensuring they can withstand regular use. Their unique mushroom design adds a touch of whimsy and charm to clothing,