5 1/2" (14cm) Knife Needle File cut 4 Swiss Pattern is a knife file, total length is 5 1/2" with a cutting portion measuring 2 1/2". Double cut, the top edge of the knife (widest part) is safe (smooth), tapers to a point. The largest height of the file is 5.1mm, the thickness at the widest part of the file is 1.30 mm. Cut 4.