Seiko Large Capacity 900 Label Roll Of Shipping Labels, 2 1/8 x 4 inches Save big and avoid shipping headaches with a bulk roll of shipping labels Quickly customize your labels & add bar codes with free Smart Label Software Includes 900 labels Label dimensions: 2-1/8" x 4" Requires SLP 650 or 650SE printer and bulk label tray (SLP-TRAY650)