12 feet by 2.25 feet. Thickness is 0.03 inches.
I bought this new and used it for just a couple of days. Too thin for my purposes, but maybe it will suit yours. It's rolled up again and waiting for a new home. [Note: the photo is from eBay, where I bought it.]
Vinyl Carpet Protector, Clear (East San Rafael)
This offer has been gifted to someone and is no longer available.