Diameter: 38mm Original illustrations embroidered. Embroidery threads used are OLYMPUS and DMC. The fabric has a slight transparency. The back is felt-backed. (The image of the back is an example) (The color of the felt varies depending on the work) This is a handmade item, so please refrain from purchasing if you are sensitive to imperfections or seeking a perfect product. Due to shipping and material costs, discounts are not available for bulk purchases. We apologize for any inconvenience, and appreciate your understanding.