We recommend two bundles of Seagrass for a standard size seat 30cm x 30cm. 4/4.5mm in thickness. This two-ply twisted natural fibre (Brown/Green), is ideal for chair re-seating. It is very hard wearing and is cheaper and easier to use than Rush. Approx 400g. Approximately 72 metres per hank. This is a natural material, therefore the weight may vary due to moisture loss.