AUS8 blade steel knife is 5.5" long, with a 3.5" blade. This knife is selling fast! The molded sheath comes with a neck chain, to wear as a neck knife, AND the sheath fits like a glove in secret pocket that is on all 5.11 8-inch boots. The knife even has a cut-out in the blade that fits the valve on an O2 cylinder. Our employees wear-tested this knife and they love it.