New "Wafu" Case Material Outside cloth: Pattern of Japanese style design on cotton. Inside cloth: Sofenasoft (R) = Special cloth that wraps jewel. This material softly wraps your knife. Clasps on cases are called "Kohaze" in Japanese: mother-of-pearl, Japanese stag hone, oild bone and black buffaloes. Closed Length of Knife 2 3/4" (70mm) = SS New Version 3 3/8" (85mm) = S 3 3/4" (95mm) = M 4 3/8" (110mm) = L 4 3/4" (120mm) = LL 5" (127mm) = XL