Picture Frame Size

Frame sizes › A4 print

What frame size fits a A4 print?

The quick answer plus an interactive mat-border calculator, a to-scale preview, and a printable guide. All sizes are computed geometry — we sell nothing.

Quick answer

Frame without a mat
A4 (8.27x11.69 in)
exact standard frame -- no mat
Frame with a mat
12x16 in
2.12 in side / 2.41 in top-bottom mat border
Print aspect ratio
approx 1 : 1.41 (ISO, ~root 2)
8.27x11.69 in
To scale: a A4 print print matted in a 12x16 in frame.

Mat-border calculator

Change the frame size to see how the mat border and opening change for a A4 print print.

inches
inches

Mat opening is cut about 0.25 in smaller than the print on each side so the mat holds the edges. Borders are the visible mat reveal.

Every standard frame for a A4 print

Borders shown as side × top/bottom mat reveal.

Standard frameMat border (side x top/bottom)
9x12 in0.62 x 0.41 in
11x14 in1.62 x 1.41 in
12x12 in2.12 x 0.41 in
12x16 in2.12 x 2.41 in
12x18 in2.12 x 3.41 in
14x18 in3.12 x 3.41 in
16x20 in4.12 x 4.41 in
18x24 in5.12 x 6.41 in
20x24 in6.12 x 6.41 in
20x30 in6.12 x 9.41 in
24x30 in8.12 x 9.41 in
24x36 in8.12 x 12.41 in
A4 (8.27x11.69 in)borderless
A3 (11.69x16.54 in)1.96 x 2.67 in
A2 (16.54x23.39 in)4.38 x 6.1 in
How these numbers are computed & sources
  • Aspect ratio reduces the 8.27x11.69 in print to lowest terms (ISO sizes are ~1:1.41).
  • "Frame without a mat" is the standard frame whose nominal size matches the print; if none matches, the nearest larger standard frame is shown.
  • "Frame with a mat" is the smallest standard frame whose per-side mat border lands in the comfortable 1.5-3.5 in range. Mat opening = print minus 0.25 in per side.
  • Standard frame sizes come from a fixed registry; we list no store inventory, prices, or product matches.

Sources for the size conventions:

  • Standard US picture-frame sizes (4x6, 5x7, 8x10, 11x14, 16x20, 18x24, 20x30, 24x36, ...) are long-standing retail conventions.
  • ISO 216 A-series paper/print sizes (A4 210x297 mm, A3 297x420 mm, A2 420x594 mm) converted to inches at 25.4 mm/in.

Last reviewed: 2026-06-21.

Other common sizes