> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sendmypaper.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Products and design

> Sizes, limits and how the front and back are laid out.

## Postcards

| | 4 × 6 | 6 × 9 |
| - | - | - |
| Price | \$2.99 | \$3.99 |
| Message | up to 600 characters | up to 600 characters |
| Front image | at least 1800 × 1200 px recommended | at least 2700 × 1800 px recommended |

* **Front:** your photo, cropped to fill the card, or a big headline on a solid color (`ink`, `sky`, `sunset`, `forest`).
* **Back:** the message on the left in a handwriting-style font; your return address, the recipient and postage on the right.

## Letters

* \$4.99 for up to about 3 single-spaced pages (9,000 characters) on 8.5 × 11 paper, black and white, folded into a #10 window envelope.
* The return and recipient addresses print at the top of the first page so they show through the window.
* Plain text only. Blank lines become paragraph breaks.

## Delivery

US addresses only (including PR, US territories and APO/FPO). Mailed via USPS First-Class, usually 3–5 business days after mailing.


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