I call this my "box scraper" as it is rigid enough to handle end-grain hollowing in box making, goblets, end-grain bowls, etc.  Unhandled. It is excellent for roughing out the interior of boxes, goblets, small end-grain bowls and the like.  Used in a shear scraping mode with a fine, burnised burr you can get an extremely fine finish on end grain in such projects that involve end-grain hollowing. 
This high speed steel scraper from Hamlet of Sheffield England is rigid and tough, being 3/8" thick and 1/2" wide.  The overall length is 9.25", with the blade about 6.5" long. 
I recommend you make a handle around 15 "to 16" in length  (see www.alanlacer.com for an article on handle making--called "Forgotten Handles" under the "Articles section of my site).