The photographic field scale card produced by our selves feature three sets of scales, centimeters, millimeters and inches. The cm and inches are displayed as alternating black and white blocks on one side, intended for placement next to samples in the field such as pebbles where as the mm scale on the opposing side has a space on which you can place small, fine particles to measure against the scale and photograph with a white background. The card is laminated making it waterproof and easy to wipe clean.
