Custom Leather Vertical Knife Sheath That Fits a 4" Double Blade Trapper. Tooled and Dyed Brown/black. Knife NOT for Sale! Custom Leather Vertical Knife Sheath that will fit a 4" Trapper double blade. Tooled and dyed Brown/Black. The knife is not for sale but measures 4" x 7/8" and 1/2" thick.