Standard Snellen Chart on styrene, 11x23 inches with rounded corners (27.5x60 cm). Includes lines for 20/10, 20/13, 20/15, 20/20, 20/25, 20/30, 20/40, 20/50, 20/70, 20/100, and 20/200. Includes 20 Ft Snellen and M notations. The green bar is at 20/30 and the red bar is at 20/20.

Back side has 10 ft Snellen Chart.

Dimensions: 23.5” x 11” (60cm x 28cm).