7hpi Plastic Canvas - A3 Sheets 7hpi Plastic Canvas - A3 Sheets 7hpi Plastic Canvas - A3 Sheets (18 ratings) £3.00 Quantity: at £3.00 each 4 in stock. Plastic canvas is ideal for children or crafters who find it difficult holding an embroidery frame etc. It is fabulous for constructing shapes too, making boxes, trains, houses, crosses, Christmas decorations etc. It is a clear, gridded stiff plastic mesh. It also makes great stiff bases for bag bottoms! Cover with fabric and stitch through. Use wool to stitch your design and be creative. Use regular scissors to cut to shape. A3 sheets 7hpi - ie 7 holes per inch, each sheet size 13in x 22in Manufactured by Darice.