> For the complete documentation index, see [llms.txt](https://help.openletterconnect.com/olc-help-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.openletterconnect.com/olc-help-docs/product-and-order-guide/products-and-specs.md).

# Products and Specs

Open Letter Connect offers a variety of high-quality mail formats tailored to help you reach your audience effectively. Whether you’re sending a quick postcard or a personalized handwritten letter, our products are designed for **maximum impact and deliverability**.

{% content-ref url="/pages/wMJiGEEfcyiunzATPKR0" %}
[Postcards](/olc-help-docs/product-and-order-guide/products-and-specs/postcards.md)
{% endcontent-ref %}

{% content-ref url="/pages/KXQI7MZEclKcTQZDYO8Y" %}
[Personal Letters](/olc-help-docs/product-and-order-guide/products-and-specs/personal-letters.md)
{% endcontent-ref %}

{% content-ref url="/pages/3PO9IMsXSQpOIrPt9Xz9" %}
[Professional Letters](/olc-help-docs/product-and-order-guide/products-and-specs/professional-letters.md)
{% endcontent-ref %}

{% content-ref url="/pages/1Hj1BZmo5HNJLPxWqSwn" %}
[Snap Pack Mailers](/olc-help-docs/product-and-order-guide/products-and-specs/snap-pack-mailers.md)
{% endcontent-ref %}

{% content-ref url="/pages/hMU19E1tW69QlIfTOXck" %}
[Bi-Fold Self-Mailers](/olc-help-docs/product-and-order-guide/products-and-specs/bi-fold-self-mailers.md)
{% endcontent-ref %}

{% content-ref url="/pages/7bMZkIjRvJfRiEtPnTdr" %}
[Tri-Fold Self-Mailers](/olc-help-docs/product-and-order-guide/products-and-specs/tri-fold-self-mailers.md)
{% endcontent-ref %}

{% content-ref url="/pages/t30VuFb8ywsUz0jjIpsC" %}
[Real Penned Letters](/olc-help-docs/product-and-order-guide/products-and-specs/real-penned-letters.md)
{% endcontent-ref %}

### Design Specs (All Formats)

| **Element**    | **Spec**                                                                                                  |
| -------------- | --------------------------------------------------------------------------------------------------------- |
| **Resolution** | 300 DPI (images and QR codes)                                                                             |
| **File Types** | JPEG, PNG (images); SVG, PNG (logos)                                                                      |
| **Fonts**      | Sans-serif for headlines (Mont-Bold, Open Sans ExtraBold); Serif or sans for body (Roboto, Lato, Georgia) |
| **Font Sizes** | Min **8 pt** for letters, **10 pt** for postcards                                                         |

### Turnaround Time

* **Production Time:**\
  **1-2 business days** after order confirmation.
* **Mail Class:**\
  USPS **First Class** (ensures timely delivery).

### Best Practices for Product Selection:

* **Postcards:**\
  Use **4x6** for **reminders** or **discount offers**. Upgrade to **6x9** for **visual-heavy campaigns** or to **stand out**.
* **Letters:**\
  Ideal for **personal or high-value** outreach—especially when more context is needed (probate, high-ticket sales).
* **Snap Packs:**\
  Perfect for **urgent-looking communications** like **tax notices** or **special event invitations**.
* **Self-Mailers:**\
  Great for **educational campaigns** or **multi-offer promos**. Use **tri-folds** for content-rich mailers.
* **Real Penned Letters:**\
  Use for **relationship-driven outreach** or when targeting **limited high-value prospects**.