Yes, a double mattress is the same as a full size mattress. The terms “double” and “full” are used interchangeably to describe the same double mattress size, making it easy to shop whether you’re searching for a double bed mattress or a full. In Canada, “double mattress” is the more commonly used term, but both refer to the same dimensions and are widely available.
Learn more about mattress sizes in our Mattress Size Guide.