Large TrayThe inside of this stamp tray measures 3 1/4 by 7 inches. The following stamps fit comfortably inside: Printer 20, 30, 40, Q43, and R50. The Printer 50 and 60 do not fit unless placed in the tray sideways. The PSI 1444 and 1854 also fit well. Xstampers no wider than the N18 will fit.Small TrayThe inside of this stamp tray measures 2 by 6½ inches. Only small pre-inked stamps will fit inside.