Duck Cotton Canvas Fabric

Duck is classified according to weight in a numerical system, with grade 1 the heaviest and grade 12 the lightest variety. Besides this, traditional names exist, which are rarely used today. No. 1 (18 oz): hammocks, cots, sandbags No. 2 (17 oz): hatch paulins No. 3 (16 oz): heavy-duty bags No. 4 (15 oz): sea bags No. 5 (14 oz): heavy work clothes No. 6 (13 oz): large boat covers, heavy work clothes No. 8 (11 oz): work clothes, clothes bags No. 10 (9 oz): work clothes, shower curtains No. 12 (7 oz): light clothes