The very highest quality grade 4mm thick poplar plywood, mainly suitable for fine craft work, hobbyists and laser cutting. Light weight, with light colour and grain, making this the perfect choice for laser cutting. The quality grading is AB/AB, providing a high quality poplar face and core. This pack of 5 measures each at (length x Width): 400mm x 400mm 40cm x 40cm 15.75 inch x 15.75 inch Please note that as the plywood is a natural product and this is a very thin thickness, there could be a slight bow or twist when placed on a flat surface. This is normal and we recommend that the ends are taped down when used with a laser cutter. There is a small tolerance in thickness of +/-0.3mm. Small pin knots of a few mm in diameter may be found at times on some sheets.