Arkansas Sharpeners Large Pocket Stone. This Knife Sharpener from the people at Arkansas Sharpeners measures 4" x 1 1/2" x 1/2" and comes bulk packed. Don't own a knife without the Arkansas Sharpeners Large Pocket Stone. Features of Arkansas Sharpeners Large Pocket Stone Knife Sharpener: Arkansas Large Pocket Stone Measures 4" x 1 1/2" x 1/2" Bulk packed Package Contents: Arkansas Sharpeners Large Pocket Stone Arkansas Sharpeners AC54: Large Pocket Stone