Coins are the currency on our site, and are used for premium cards and content like envelopes, envelope liners, backdrops, logos, and other options. This breakdown is a cost per email address. Whenever you add one of these items, you’ll see the price reflected in the upper right hand corner of your Customize page:
The cost of your mailing is determined by its Coin cost multiplied by the number of recipients on your list.
To find out more about exact pricing see: What is the cost of a Coin?