Dimensions: 18 mm (height) x 20 mm (width) x 2 mm (thickness) At the top is a hole for hanging any hook of your choice. Recommended to print with PLA; layer height 0.1 or 0.15 mm. You have to change the filament in the correct layer (1.1 mm). The print on the photo uses Fillamentum Vertigo Gallaxy and Pearl Ruby red. My printer was a Prusa Mini with 0.4 mm nozzle.