These earring display cards are white with Stainless Steel printed in thick black permanent ink that doesn't smear or spread. The cardboard material is 0.4mm thick and it's very strong and sturdy so you don't have to worry about them being too delicate and not withstanding a lot of use. We have uploaded a video to show just how sturdy they are. The cards measure 4 1/4 inch from the top to the bottom and 2 1/2 inches across. There are precut hole and tabs so these can be used for many styles of earrings including hooks, hoops, leverbacks, kidney etc. From the center of the hole to the bottom of the card they are 3 1/2 inches long so these are perfect for long earrings. Package of 20 cards!