Stores that sell plastic canvas seven-count mesh include sewing and needlework stores such as Jo-Ann Fabric, arts-and-crafts stores such as Michael's, and hobby shops such as Hobby Lobby. The plastic mesh has seven holes per inch and provides a stiff, yet bendable, backing for embroidery and knitting projects.
Jo-Ann Fabric sells the Darice brand in 12-inch x 18-inch clear plastic sheets costing $1.99 each. Michael's also carries Darice, but in 13.5-inch x 10.5-inch sheets that come in black, bright purple, pink and red. Michael's charges 69 cents per sheet. Hobby Lobby sells 13.5-inch x 10.5-inch clear plastic sheets by Yarnology, also for 69 cents each, as of September 2015.