Our B3X5 flap seal bag holds a single 4 Baronial or A1 size envelope and card. At 3 13/16" x 5 3/16" this bag is also a great option for a 3 1/2 x 5" or 9 x 12 cm art and photos with mats and backing up to 1/8 inch. Our B3X5 flap seal bag measures 3...