it's two stacks next to each other. About the size of a case of toilet paper.I used to work in shipping. The size of the box was the first thing to bump up the price for FedEx and UPS. For example, if we had 30x40 (inch) photograph, and shipped it flat in a 34x44 box, it would be $40-50 MORE than if we rolled up the print and shipped it in a tube.
So... were the 75 egg cartons laid out side-by-side? I would assume they'd be stacked in batches of 15...?