---
title: Types of mailers – availability, volume requirements
description: "Thankster offers four types of mailers:  Folder cards, flat cards, postcards, and letters. **Folder Cards:**  These are our most popular.  They come on heavyweight stock and provide four pages for your content (images, text, QR codes, signatures).  They are mailed…"
url: "https://thankster.com/docs/types-of-mailers-availability-volume-requirements/"
updated: "2024-08-30"
category: Using the Editor
---

# Types of mailers – availability, volume requirements

Thankster offers four types of mailers:  Folder cards, flat cards, postcards, and letters.

**Folder Cards:**  These are our most popular.  They come on heavyweight stock and provide four pages for your content (images, text, QR codes, signatures).  They are mailed in matching envelopes.

**Flat Cards:**  These come on the same stock as folders, but are comprised of two pages - the front and back.

**Postcards: ** These are standard postcards - they are the same as flats but do not have an envelope.  The address goes on one side, leaving about a page and half for content.

**Letters:**  These are standard 8.5 x 11 inch, plain paper letters.

**Availability:**  For integration plans - small plans can send folders, medium plans can send folders and flats, large plans can send folders, flats, and postcards, and XL plans can send all types.  Non-plan users can send all types as well, but at higher price per card.

**Minimum volume requirements:**  Folders have no minimum volume.  Currently, the other types have a minimum volume of 150 pieces per one-off project and 150 per month of automated orders.