Features and Benefits: Mini-Blocks are miniature sanding blocks for fine detail sanding applications. These blocks are constructed of a specially formulated compound and their ergonomic shapes allow for fine, fingertip sanding on a wide variety of profiles and body lines. Blocks measure 3-1/2 inches in length.; Rectangular Mini-Block for Flat Sanding and Tight Corners1-7/16" x 3/4" x 3-1/2" Size Made in USA;