ForusewithProfileMaker5 DigitalCameraModule Chart contains 140 color patches chosen for optimal results. Includes standard 24 ColorChecker chart colors. More skin-tone reference colors deliver greater accuracy and consistency over a wide variety of skin tones. Grayscale steps provide accurate control of camera balance and maintain a neutral aspect regardless of light source. Sturdy, standardized target size of 8.5 x 11 inches (21.6 x 27.9 cm) easily fits into a full frame shot