HEIGHT ADJUSTABLE - The height of the 11.125 x 8.625 x 2 inch cardboard boxes are adjustable, with scores on the depth side to be easily adjusted to 0.5 1 1.5 or 2 inch height as your need; LIGHT-WEIGHT YET STURDY - The easy fold box mailers are made of 32ect E flute cardboard, which is light-weight(only 3.04 ounce) yet sturdy for shipping mailing small letter size items, like comic books, framed pictures, magazines, 100-400 letter-size sheets etc., and with special design for the corner, not spliting during your online business shipment; FLAT PACKING - the 50 pack of white box mailers are shipped to you in flat packing, which can save your storage space; EASY TO FOLD - The corrugated boxes are easy to fold up in seconds, you can prefold the height as your need, then put your items in the center, and fold up the boxes, then seal the boxes by tape; ELEGANT FOR BUSINESS - The outside of the packaging boxes are in white paper, you can paint on it or stick your own labels, stickers, ribbons on it, which is very elegant for your business or small gift packaging shipping; HEIGHT ADJUSTABLE - The height of the 11.125 x 8.625 x 2 inch cardboard boxes are adjustable, with scores on the depth side to be easily adjusted to 0.5 1 1.5 or 2 inch height as your need; LIGHT-WEIGHT YET STURDY - The easy fold box mailers are made of 32ect E flute cardboard, which is light-weight(only 3.04 ounce) yet sturdy for shipping mailing small letter size items, like comic books, framed pictures, magazines, 100-400 sheets etc., and with special design for the corner, not spliting during your online business shipment; FLAT PACKING - the 50 pack of white box mailers are shipped to you in flat packing, which can save your storage space; EASY TO FOLD - The corrugated boxes are easy to fold up in seconds, you can prefold the height as your need, then put your items in the center, and fold up the boxes, then seal the boxes by tape; ELEGANT FOR BUSINESS - The outside of the packaging boxes are in white paper, you can paint on it or stick your own labels, stickers, ribbons on it, which is very elegant for your business or small gift packaging shipping;