We recommend covering the entire inside of the bed frame with duct tape because those very small metal burrs can cause small holes in the boxspring encasements. At this point we would recommend using a second encasement on top of the first so that you don't miss covering a hole with duct tape.
The exact dimensions for the FULL- Protect-A-Bed Box Spring Covers are 53x75x9. Currently, we do not ship to Canada due to export regulations. The case price for the Full boxspring covers (8) is $275.00, but you should always check the product page as prices are subject to change.