flat rate boxes from the u.s. postal system is the way to go especially if it is a heavy box, can save you a fortune! if it is light weight but bulky i would either cut back on the contents and put it into 2 boxes or find a larger packaging but use parcel post. I was spending a fortune using ups to send boxes to my son in the navy, and then found it really is much more cost effective to send through the post office. In june he wanted me to send him something he had left home, i took it to the ups store and found it was going to cost $45 to ship it, (it was something he bought for about $30) i left and was just not going to send it, but stopped by the post office on my way home and sent it out for $10.95. and it seems to make a difference if you are printing off your own postage or actually going to the post office. if you do it yourself on line you seem to have fewer choices. if you go in you can ask, what is the least expensive way to send this.