Postcard optimal size

[Felipe Carrillo]

Hello BP,

I want to embark on my first direct mail marketing campaign using postcards, and I wanted to see if I could get a recommendation on postcard size based on what seems to get the most attention/calls. These are the postcard sizes that seem to be available:

• 5.47" x 4.21"
• 6 x 4"
• 7" x 5"
• 8.52" x 5.47"
• 11" x 6"

There is a significant difference in pricing between sizes and would like to avoid having to "over pay" but still get noticed.

Thanks in advance for the help!