I mail quilts all the time; I suggest 2-3 day Priority Mail through the post office. Don't bother getting insurance, they won't pay if it gets lost, you can get signature delivery confirmation so you know if/when it arrives, but other than that, don't bother to pay for any insurance...I've never had one get lost if that makes you feel better, sometime I used their flat rate boxes, sometimes not, but it always gets there within 2-3 days.