This shipping method is free to the customer.
First Class Mail shipping time averages 3-5 days after order is shipped. The shipping time can be longer, especially before holidays.
There is an additional, non-refundable charge of $4.00 for Priority Mail upgrade.
Priority Mail shipping time averages 2-3 days after order is shipped. This can be longer during holiday season.
There is no guaranteed delivery date for Priority Mail, but it tends to be more reliable than First Class Mail, as far as on-time delivery is concerned.
When checking out, there is a prompt in the shopping cart for shipping choice.