2.25". Mirror side has dots of silvering off a narrow edge of the extreme perimeter. The glass is slightly convex and produces an enlarged image. Text on the celluloid reads "Every Bodys Friend/Magnifies 4 Times/Agents Sample 30¢." Extensive text below "Your Loveliness Depends On Good Teeth And Complexion. I Use This Glass Sold By H. H. Debolt, Div. 50, B. Of L.E. Morgantown, W.VA./No More Wild Hairs, Blackheads Or Pimples." Celluloid is in a matte finish with light surface wear but just a single pinpoint tan dot on upper edge. First we've seen.