Measures 25" long x 8" tall. It’s designed to store the lower receiver of an AR-15 style carbine. It will accommodate most grips of standard dimensions as well as any length stock. It is fully padded on each side with a single zipper top opening. There is hook Velcro along the bottom and sides of the divider to hold it in place inside the main compartment. The divider can be positioned as needed to accommodate a bulkier upper receiver.