This is a set of 19 flower parts. They are a slightly yellow, translucent color. The back side is approximately 9-13mm. The outline is not a perfect circle, so an 8mm dish is the perfect size. The center is slightly recessed, but they can be easily attached to flat dishes. Some are from overseas, so there may be minor scratches. Please refrain from purchasing if you are sensitive to such imperfections. Thank you.