These tough, 2-ply, 3-mil Weston Vacuum Sealer Bags (model 30-0011-W) are 11 inches wide and are as long as you choose, because this is the commercial-grade "bag on a roll" style. Designed to be compatible with most brands of vacuum packaging systems, these bags are economically priced but are of excellent quality. As all competent food professionals know, vacuum sealing is the best way to keep food fresh they will preserve the usability of foods up to 6 times longer than other non-vacuum methods and these tough bags can be boiled or microwaved (poke holes in the bag before nuking), or frozen for longest shelf life. Vacuum sealing foods before freezing virtually eliminates wasteful "freezer burn" and keeps stored foods from dehydrating. These bags are reusable, dishwasher safe and are B.P.A.-free.