Picking a card size is a very important step when creating a direct mail campaign. You have to make sure that is the one with the properties you need to get your customers’ attention.
On the ‘Postcard Design’ view, you can see the option ‘Card Size’. There you can pick the size that works best for you. You have 4 different options and each of them has the cost per Postcard under it. Click on the option you want.
If you are uploading your files, make sure to follow the file requirements for each card size.