Linda's Layering Frames Set 5 - Celtic A4 Square & A5 Square Groovi Plate Collection3x 210mm x 210mm Groovi Plates 1x 148mm x 148mm Groovi Plate Groovi Plate (GP) Intricate and clever designs have been laser etched with precision into top quality acrylic plates, thereby allowing you to get in the groove with a specifically made to measure embossing tool, and effortlessly follow the design path through parchment. The end result is quick, crisp and clean. For best results from the Groovi Plates and Groovi Plate Mate, use the 0. 8mm 1.