Romanoff Stowaway Letter Box No Lid, 5" , Green. Our 5'' Stowaway Letter Box can safely store twice as much as our 3" Letter Box. Your stationary and other important papers can be stored just as efficiently. Choose from the number of great colors we offer, and stock them atop each other to save space. 13 x 10.5 x 6 in, Fits Paper: 8.5 x 11in. Bundle of 4 Boxes.