Greeting card size: A6, postcards for mailing and folded cards
The standard card in most of the world is A6, 105 × 148 mm; in the US the common sizes are 4 × 6 and 5 × 7 inches. Internationally, a postcard mailed without an envelope must be between 90 × 140 and 120 × 235 mm under Universal Postal Union rules. A folded card is usually an A5 sheet folded down to A6.
| Format | Millimetres | Inches | Pixels at 300 dpi |
|---|---|---|---|
| A6 | 105 × 148 | 4.1 × 5.8 | 1240 × 1748 |
| A5 | 148 × 210 | 5.8 × 8.3 | 1748 × 2480 |
| US 4 × 6 | 102 × 152 | 4 × 6 | 1200 × 1800 |
| US 5 × 7 | 127 × 178 | 5 × 7 | 1500 × 2100 |
| Square | 150 × 150 | 5.9 × 5.9 | 1772 × 1772 |
Mailing a postcard
Internationally, a postcard without an envelope must be 90 × 140 to 120 × 235 mm (UPU). In the US, USPS postcard rates apply only to cards from 3.5 × 5 to 4.25 × 6 inches — a 5 × 7 card goes in an envelope at letter rate. Check your postal service before printing a run.
In the Twelver chat a card is built on an exact canvas — for A6 at 300 dpi, a 620 × 874 canvas exported at double density — with the greeting set as real text so names are never garbled. Making a card from your own photo is covered in a card from a photo.
Frequently asked questions
What is the standard greeting card size?
What size can a postcard be for mailing?
Try it yourself
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