Show Your Colors! Use these hearts on your vehicle windshields. Sold by the dozen {12 per pack}. Size: 7 inch diameter. Neatly shrink wrapped in packs of a dozen with a chipboard backer to prevent curling during storage. Made of durable, waterproof vinyl, these hearts are made of non-fade inks. Each heart is slit on the back for easy application. Removable adhesive allows easy, clean removal.