Finalizing a design for a close contact fighting knife as a gift to a friend's son who will deploy on his initial tour after the first of the year with his special ops outfit. 1) Would like a recommendation for the length of blade; initially, I have designed it at 7 1/4 inches in length and 1 1/2 inches wide. This initial length I determined when checking some theater knives in my collection; to me, the length seems to be a little long for the intended purpose, but it may seem too long due to the narrowness of the blade. 2) Also would appreciate a recommendation on the type of scabbard: ease of carry/accessibility (I have never made sheaths for the purpose of fitting in with all the gear currently carried in the field): should material be leather or Kidex and what type(s) of attachment method(s) should be used ie. d rings--or possibly, belt loop;I would appreciate any links to appropriate types of knife sheaths/scabbards that I could use as a base line for carry design. Thank all in advance for any shared information/suggestions to complete this personal defense outfit for this troop...