For those of you who mail items out and can use the new bubble flat rate mailer at USPS this is a real cost saver. $4.95 and I can fit a 2 pound book and mail it 3,000 miles away and get it there in 2 days and the bag is free. It can also fit 14-18 decks of cards and other items. Right now they limit you to 15 bags and I have a hunch they will possibly drop this since I think it is losing them money. I use it so much I just wanted to share with you under this thread. There are rules to using this as you can not alter the size by cutting and taping the sides, bottom or top, but that is understandable.