A standard 16×20 photo measures 16 inches by 20 inches and equals about 40.6 × 50.8 cm. For high-quality printing, photographers often use images around 4800 × 6000 pixels at 300 DPI. This resolution ensures sharp details and prevents pixelation when the photo is printed in a larger format. https://clippingexpertasia.com/blog/how-big-is-a-16x20-photo/