> For the complete documentation index, see [llms.txt](https://help.lob.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.lob.com/print-and-mail/designing-mail-creatives/mail-piece-design-specs.md).

# Mail piece design specs

Browse our available mail formats and associated design specs:

<table data-view="cards"><thead><tr><th></th><th data-hidden></th><th data-hidden></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td><strong>Postcards</strong></td><td></td><td></td><td><a href="/pages/GWubpwyedg0alyyK2mRa">/pages/GWubpwyedg0alyyK2mRa</a></td><td><a href="/files/qBZGfylgcvyBwceNNlYo">/files/qBZGfylgcvyBwceNNlYo</a></td></tr><tr><td><strong>Self-Mailers</strong></td><td></td><td></td><td><a href="/pages/yrDIE0z5ZKKC6hAJiewV">/pages/yrDIE0z5ZKKC6hAJiewV</a></td><td><a href="/files/IReQR6xuXzzv2NzyswBo">/files/IReQR6xuXzzv2NzyswBo</a></td></tr><tr><td><strong>Letters</strong></td><td></td><td></td><td><a href="/pages/cPHp1Lorv4H0OViiHVSj">/pages/cPHp1Lorv4H0OViiHVSj</a></td><td><a href="/files/WQD8C5I7JzDKc0QYMP6S">/files/WQD8C5I7JzDKc0QYMP6S</a></td></tr><tr><td><strong>Letter Envelopes</strong></td><td></td><td></td><td><a href="/pages/L4f1xCMRIpu86aOFZVOq">/pages/L4f1xCMRIpu86aOFZVOq</a></td><td><a href="/files/Bn6QSwAKmrUKncHW8zkj">/files/Bn6QSwAKmrUKncHW8zkj</a></td></tr><tr><td><strong>Letter Add-ons</strong></td><td></td><td></td><td><a href="/pages/kuzeeEdjdMoes1rnxAw4">/pages/kuzeeEdjdMoes1rnxAw4</a></td><td><a href="/files/W4l61Q2d7Yg88vGkMsWp">/files/W4l61Q2d7Yg88vGkMsWp</a></td></tr><tr><td><strong>Checks</strong></td><td></td><td></td><td><a href="/pages/O902fvgHETMFM8VP8V5C">/pages/O902fvgHETMFM8VP8V5C</a></td><td><a href="/files/gma03AsH6FIUK5iJpLtB">/files/gma03AsH6FIUK5iJpLtB</a></td></tr><tr><td><strong>Snap Packs</strong></td><td></td><td></td><td><a href="/pages/cTdYit7N0DPaVrg9cVJd">/pages/cTdYit7N0DPaVrg9cVJd</a></td><td><a href="/files/fxEzEvpMiAeKJC0WjVOH">/files/fxEzEvpMiAeKJC0WjVOH</a></td></tr><tr><td><strong>Booklets</strong></td><td></td><td></td><td><a href="/pages/KKoAYtKPjQwVjFZO3bfN">/pages/KKoAYtKPjQwVjFZO3bfN</a></td><td><a href="/files/9TPnIXBgakQoRsnh8qg2">/files/9TPnIXBgakQoRsnh8qg2</a></td></tr><tr><td><strong>Custom Mail</strong> </td><td></td><td></td><td><a href="/pages/xwCE4qpEv6p1L0iwisqY">/pages/xwCE4qpEv6p1L0iwisqY</a></td><td><a href="/files/B3HrXLhK1mwu7WOW0dXR">/files/B3HrXLhK1mwu7WOW0dXR</a></td></tr></tbody></table>