SMALL BOX SIZE - The internal dimensions of the stackable cardboard boxes are 7 x 6 x 3 inches (LxWxH), and the external dimensions are 7.56 x 6.19 x 3.12 inches; LIGHT-WEIGHT YET STURDY - The box mailers are made of 32ect E flute cardboard, which is light-weight(only 2.95 ounce) yet sturdy for shipping mailing small items, perfect for your online business shipment; FLAT PACKING - the 25 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 put together in seconds, the tuck top has two locking taps to closure boxes and keep them secure during shipping; ELEGANT FOR BUSINESS - The outer 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; SMALL BOX SIZE - The internal dimensions of the stackable cardboard boxes are 7 x 6 x 3 inches (LxWxH), and the external dimensions are 7.56 x 6.19 x 3.12 inches; LIGHT-WEIGHT YET STURDY - The box mailers are made of 32ect E flute cardboard, which is light-weight(only 2.95 ounce) yet sturdy for shipping mailing small items, perfect for your online business shipment; FLAT PACKING - the 25 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 put together in seconds, the tuck top has two locking taps to closure boxes and keep them secure during shipping; ELEGANT FOR BUSINESS - The outer 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;