A3 Green Cutting Mat With Grid Lines - Double-Sided- By Zieler | 09299355 , A3 Cutting Mat with grid lines on both sides: These are an essential tool for any designer, crafter and student that are using scalpels or craft knives - ideal for activities such as lino cutting. They not only protect your desk surface but also make it easier to cut patterns and straight lines Made from 3mm thick quality double-sided material Self sealing mats with a Metric gridded pattern of 10mm squares one side and 25mm squares on the other side. Plus other helpful measurement aids printed on the mat. A3 450 × 300mm x 3mm , Dimensions (mm) = 450 x 300 x 3