How many times do we ship something and think to ourselves, " this is gonna cost more than it’s worth", or "I know they would like to get this quick, but it just costs too much".
Well, have you considered the good ole US Post Office?
the inside dimensions for the two boxes available are 11" x 8.5" x 5.5" and 13.625" x 11.875" x 3.375". The two boxes are different shapes to accommodate a variety of contents. This box, stuffed with whatever you are shipping, costs only $8.95 to ship anywhere in the US. They say it will arrive in 2-3 days, and I have found that is correct.
I think you will find this a very cost effective way to ship. You can also register on the usps.com site to have the box picked up at your house. You will find many more helpful things on the site. They will even ship you the empty boxes to fill, free of charge.