These heart stud blanks are perfect for making your own earrings, all you need to supply is the stud posts. These heart blanks measure aprox 14mm across. This pack of 10 will make 5 pairs of earrings. Solid Colours and Glitter Acrylic comes with protective paper on both sides which needs to be removed before use. Mirror Acrylic comes with protective paper/plastic (which needs to be removed before use) one one side and the other side is grey or white which cannot be removed.