2026-11-06
Christmas Card Sizes Explained (With the One That Always Works)
You picked the photo. You like the photo. Then the print shop asks “what size?” and the moment dies. Here is every Christmas card size that matters, what each one is good for, and the one to choose when you just want it to work.
The short answer
5x7 inches is the default that never fails. It fits standard envelopes (A7), it is big enough for a family of five, small enough for a stamp, and every print service on earth supports it. If you are unsure, generate your photo for 5x7 and stop reading.
Making the photo itself takes about thirty seconds — upload a selfie, pick a card-ready style on the Christmas card generator, download. The rest of this guide is about turning that download into paper.
The standard sizes
| Size (inches) | Envelope | Best for |
|---|---|---|
| 5x7 | A7 | The default. Families, portraits, single-photo cards |
| 4x6 | A6 or 4x6 photo mailers | Budget prints, photo inserts, school exchanges |
| 5.5x8.5 (half letter) | A9 | Flat cards with a greeting printed alongside |
| 6x6 square | 6x6 | Modern Instagram-crop look |
| 5x15 panoramic | 5x15 | Triptych layouts, three photos in a row |
Pixels, if the printer asks
Print shops think in inches, file dialogs think in pixels. At 300 DPI (the quality floor for print):
- 5x7 → 1500 x 2100 px
- 4x6 → 1200 x 1800 px
- 6x6 → 1800 x 1800 px
Anything at or above these numbers prints clean. Below them, you will see softness — especially on faces. The HD downloads from the photo generator land at print resolution, which is why the card style exists at all.
Three mistakes that ruin card prints
1. Cutting heads with a border. Printers cannot print to the exact edge; anything in the outer ~1/8 inch gets eaten. Keep faces in the middle 90% of the frame. Card styles on this site compose with that margin already.
2. Generating at screen size. A photo that looks sharp on a phone is often 1080 px wide — fine for stories, soft at 5x7. Always download the HD version for print.
3. Squeezing a wide group shot into a tall card. A panorama of six cousins will not fit 5x7 without cropping someone’s shoulder. Either generate each person separately in the same style and collage, or go panoramic.
A reasonable plan for this December
- Generate the photo in the card style — one per person, or one group shot.
- Order 5x7 flat cards with a printed greeting (a photo + text layout survives the mail better than a folded card).
- Keep the HD file. Reprints next year beat re-shoots.
That is the whole ritual. The card size rabbit hole goes deeper — folded vs flat, paper weights, matte vs gloss — but none of it changes the photo. Pick 5x7, spend the saved hour on the ugly sweater portrait instead.