Standard Card Sizes

Card size Dimensions (inches)
A7 5" x 7"
A6 4 1/2" × 6 1/8"
A2 4 1/4" × 5 1/2"
e-card 470 × 264 pixels, 2048 × 1536 pixels
These sizes are so that any customized card you make can fit in envelopes, since greeting cards, whether they're a birthday greeting card or Christmas card, will probably be mailed unless you're making an electronic greeting card or animated greeting card. Within this standard card size table, you can figure out what size you need and design your own card style easily, adding your own images, text, and more. Those size are suitable for physical and electronic cards.