It's 5 mm. Almost the same all the way to the bend and after that it is less wide.
it sounds kinda thin for its size but then again the heft itself might compensate for the blade's thickness. now would this be more of a ceremonial type rather than the field type? the okir designs on the blade is mesmerizing, tho. mike, is it okay if could you post a close up of the design itself? btw, do you know if the blade is laminated?