We have made these insulated boxes with the best materials available. All foam is virgin EPS foam for the best in "R" value. Boxes are sized for the best shipping rates so you can save when shipping. We have tried to have the most popular sizes that everyone uses. If you feel we need to carry another size please let us know and we would be happy to look into it for you. If you use a lot of boxes and would like to have your logo put on the box please contact us.