DGK Color Tools Tablet Size Digital Grey Kard - White Balance / Color Reference Card DGK-T is a full-size calibrated and tested white balance card / digital color correction tool for digital photography Digital Grey Kard - Tab consists of a 7 1/2 x 9 1/2 x 1/8 inch (187 x 240 x 3 mm) certified white balance tool / color reference card. The card is the same size as the full size iPad tablet. Includes a premium carry lanyard and complete user guide. Works with any digital still or video camera - Works with film cameras. Any file type, JPEG or RAW Our cards are designed in Boston, Massachusetts and quality made in the USA of commercial PVC plastics with pigment-based colorants for color accuracy.