I bought these to make Hello Kitty. These are the leftovers. They are flat-backed, not the pin-on type. There are 5 sizes. I've listed the sizes in order from largest to smallest, so please use them as a reference. Sizes: Approximately 1.9 x 1.3, Approximately 1.5 x 1.0, Approximately 1.2 x 0.9, Approximately 1.0 x 0.8, Approximately 0.8 x 0.6 The largest size has 8 yellow and 8 black pieces. The others have around 17-20 pieces each. The smallest black ones have about 30 pieces. There are also some shaped like the ones in image 4. Shipping will be in simple packaging.