Hi Lew, 
Not necessarily larger as size does vary even within a given type. The size of the 2 Meccan items shown is quite different. The one on the black belt is quite a deal smaller than the other. The so called GUSBI of southern Arabia has a very much longer hilt than other Kahnjar of the general area. 
Regards Stuart
		 
		
		
		
		
		
		
		
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