Recently got a pira off ebay. It's slightly smaller, rougher (especially the hilt) as compared to my older piece but still a great wield, very light and manueverable, probably the forerunner of the modern pira. Hilt is 5.25in, blade is 19.25in.
Very unusual example Xas! Special the strong curve of the blade is very unusual. Hilt and scabbard could very well original I guess.