I fired frit on top of the glaze. Approximate size: Length: 3.5 cm Width: 2 cm I have stored this at home after making it. Please refrain from purchasing if you are concerned about minor details, as it has been stored by a private individual. Returns, refunds, and exchanges are not accepted. The shipping method may be changed. Please understand this beforehand. It will be sent in simple packaging. Thank you for viewing.