A3 size
29.7 × 42 cm · 11.7 × 16.5 in
A3 is 297 × 420 mm, or 29.7 × 42 cm, which is 11.7 × 16.5 in. Numbers are hard to picture, so here is an A3 print hung at its real size in real rooms.
How big A3 is on a wall
The sample painting as an A3 print, 29.7 × 42 cm, hung at its real size.
A3 in numbers
- Centimetres
- 29.7 × 42 cm
- Millimetres
- 297 × 420 mm
- Inches
- 11.7 × 16.5 in
- Ratio
- 1:1.41, the same shape as every A size
- Pixels to print sharp, 300 dpi
- 3,508 × 4,961 px
- Pixels for a poster, 150 dpi
- 1,754 × 2,480 px
On a wall seen from a step or two away, a print at 200 dpi looks just as sharp, and needs 2,339 × 3,307 px. Check your image.
What size frame for an A3 print
- Without a mount
- an A3 frame, 33.7 × 46 cm on the wall
- With a mount
- a 40 × 50 cm frame, 44 × 54 cm on the wall
- Mount width
- 5.7 cm at the sides, 4.5 cm at the top and bottom
- Mount window
- 28.7 × 41 cm
- Other frames that take it with a mount
- A2, 50 × 70 cm
Sizes on the wall include a slim 2 cm frame. Mount widths are measured from the window, as framers quote them. The window is a little smaller than the print, so the mount holds its edges. See an A3 print framed on a wall with the frame size calculator, in the frame and mount colours you choose.
Sizes of the same shape
An image made for A3 prints at these sizes without cropping: A4, A2, A1, A0.