Polar TechXM2C Thermo Chill Expand-em Series Insulated Carton with Foam Shipper, 10-3/8" Length x 10-3/8" Width x 7-1/4" Depth (Case of 4)

I order these for my friend that uses them for her cheesecake business. She ships her cheesecakes (with coolant packs) in these overnight and they arrive perfectly. They're the perfect size.