So this is an old thing from back in my eBay selling days but it's still a thing and it could save you a few pennies.
As Chris has stated sometimes shipping United States Postal Service Flat Rate can be a great way to get small shipments to Boardsort. What everyone might not know is that if you have a Paypal account (any will do doesn't have to be business) you can buy shipping labels at a discounted price.
So attached I'm listing the current prices of USPS.com's small, medium, and large Priority Flat Rates. Below I will list the prices you can get from Paypal's shipping link.
Sm. Flat Rate Box $7.50
Med. Flat Rate Box $12.80
Lg. Flat Rate Box $17.60
Here is the link to the
PayPal Shipping as it can be a pill to find otherwise!
Hope the helps. Happy Scrapping!