FMM Impression Mat - Cobblestone & Stone Wall These cobblestone and stone wall design impression mats are the perfect way to enhance your cake design on any celebration cake. To use: Knead and roll out your chosen paste to an even thickness. Choose the design side and put mat onto paste. Firmly use a smoother evenly across the mat to emboss the design into the paste. Remove the mat and design will have embossed onto the paste. Dimensions: 145mm (L) x 70mm (W)