The Cookie Embosser is 3x3 inches, it is reusable and will last for a long time, wash with a toothbrush to remove any excess icing that remains in the lettering after use. 3mm thick and will help create beautiful cookies with a piped icing effect. The acrylic is food safe and clear so the icing can be centered correctly. Best used on cookies that are 6-8cm in diameter.