A 5x7 photo equals 12.7 by 17.8 centimeters or 127 by 178 millimeters. In digital format, pixel size depends on resolution. At 300 DPI, it requires 1500 by 2100 pixels for best quality. Lower DPI reduces pixel count but may affect sharpness in print. https://clippingexpertasia.com/blog/5x7-photo-dimensions/