EK Sticko Stickers are acid free and photo safe. Great for collecting, invitations, stationery, gift wrapping, parties, scrapbooking, and much more. Metallic Rainbow Hearts- Package contains 280 pieces. Pieces are heart shapes in 3 sizes. All in holographic foil colors of Red, Orange, Yellow, Green, Blue, and Violet. Sizes are approximately 3/16, 1/4, and 3/8".