A3 paper with almost twice the area of letter-size A4 paper is a big sheet used in photography and printing. A3 paper comes mostly in the form of photographic paper for prints and glossy finish paper for inkjet printers to produce large prints of high quality.
Coloured paper also comes in A3 size for art projects. A3 paper is usually thick and heavy in weight, making it ideal for artistic printing, photography and paper construction. Print right on A3 paper.