Is your corrugated board single or double wall? November 07, 2020 00:06 Updated Our corrugated boxes are produced with single wall board.You can read about the default thicknesses of our box materials here. Related articles How thick is the material on my boxes and how much will they weigh? Are your boxes made in the USA? Do you have any price breaks? Can I ship a mailer box without using any other external packaging? Can I order a sample of my custom size or design?