I Have Started To Use It When Shipping Eggs. The First Couple Shipments Were Sent In The #7 Priority Mail Box From Usps. They Are 12x12x8. I Packed Newspaper In The Bottom Then The Foam, Then More Newspaper. This Worked Very Well With No Broken Eggs And The Air Cell Intact. I Also Sent 2 Boxes Of The Medium Priority Flat Rate With Very Little Newspaper. One Was Ok The Other Had Two Broken Eggs. I Very Seldom Had Broken Eggs When I Packed Them In Newspaper However The Foam Is A Lot Less Labor. Newspaper Is Free. The Foam Pads Are Expensive.