Postcard Sizes: Standard, EDDM and Direct Mail (US, UK and EU)

Standard postcard sizes in inches, mm and pixels, the US postal and EDDM size rules, UK A6 and A5, and how to set up a print-ready postcard file.

What is the standard postcard size?

In the US it is 4 × 6 inches (102 × 152 mm). In the UK and Europe it is A6, 148 × 105 mm. Larger common sizes are 5 × 7, 6 × 9 and 6 × 11 inches, and A5 (210 × 148 mm).

What size are EDDM postcards?

EDDM pieces must be flats: longer than 10.5 in, taller than 6.125 in or thicker than 0.25 in, up to 12 × 15 in. Common sizes are 6.25 × 9, 6.25 × 11, 6 × 11, 8.5 × 11 and 9 × 12 in. A 4 × 6 card does not qualify.

What size is a 4 × 6 postcard in pixels?

At 300 dpi it is 1200 × 1800 px, or 1275 × 1875 px with 0.125 in bleed. An A6 postcard is 1748 × 1240 px, or 1819 × 1311 px with 3 mm bleed.