I Heart Guts Share Your Kidneys Stickers - 15 Kidney Stickers - Vinyl Sticker Pack Yay! 15 cute kidney stickers for one low price! Strong stickers! Put a kidney on your car or computer. Give a spare kidney and keep your own! Learn about your kidneys with our fact-filled cardboard backing. 15 extra-large outdoor quality vinyl stickers measure about 3 each.