Purchased in November 2025 at the Nijntje Museum in Utrecht, Netherlands. Size (approx.): 9.5 x 3.0 x 1.5 cm The design is the same on both sides, and it is round and thick. *See the second image. There is a stain on one side that appears to be an initial defect. It's only noticeable after taking the photos, but please consider purchasing only if you understand that this item has been stored at home.