C6/A6 Postal Box Size: Pack of 100 brown C6/A6 cardboard postal boxes with internal dimensions of 163 × 112 × 20mm (16.3 × 11.2 × 2cm/6.42 × 4.41 × 0.8”) and external dimensions of 165 × 114 × 23mm, suitable for packaging and mailing smaller items. Cardboard Construction: Manufactured from cardboard with a brown finish, the boxes are supplied flat packed and can be assembled when required for mailing, packaging and storage applications. Large Letter Format: The C6/A6 dimensions are suitable for Large Letter postal applications, subject to the applicable size and weight requirements of the postal service being used. Flat Pack Design: Supplied flat packed for storage before use, the boxes can be folded into shape when required and are suitable for lightweight contents. 100 Boxes for Multiple Uses: Pack contains 100 brown postal boxes suitable for cards, documents, stationery, small gifts, accessories, craft items and other suitable lightweight products. Suitable for home, office and retail packaging applications.