The original No. 1 Standard Rear Bag is used mainly to take care of huge butt stocks on many magnum and other similar rifles. Bag size: 5" W x 6 3/4" L x 2 5/8" H at the front end and then tapers to rear to match the shape of the rifle stock. Note: Bags are not filled with sand when purchased and will need to be filled by customer. Made in U.S.A. 100%.