Sizes vary by board type: standard full-size covers fit boards roughly 13–15 inches wide by 53–54 inches long; tabletop or mini covers are about 12 inches by 30–32 inches; accessory/sewing pads are listed at about 16 inches by 32 inches.
Common anti-slip features include silicone backing to increase grip and bungee cord binding (elastic edges) that secure a tight fit around the board to keep the cover in place during use.
Silicone-coated finishes and other specialized coatings are described as offering improved stain resistance, scorch resistance, and added durability while ironing.
Pads are described as 4 mm fiber pads paired with 100% cotton covers. Some products use a one-piece solid construction (integrated pad and cover) for a smooth, even surface.
Some covers are designed as one-piece constructions (fiber pad plus 100% cotton cover) sized for mini tabletop or over-the-door boards (about 12 by 30–32 inches) and use bungee cord binding for a secure fit.
Accessory pads with silicone backing and dense pad construction help prevent a sewing machine from "walking" and can reduce unwanted machine noise by providing a more stable, cushioned surface.