FWIW, the bags That I sent are 3.5x5", same size as what we were using from the start, but they have a pleat in the bottom that will allow the bag to hold mo'. How good the zip seal is...time will tell, but they will be much better than sandwich baggies. Regular old Ziploc baggies leak moisture, air and flavor. Especially bad with aros. Really, really bad with Lakelands! That's how the box got ghosted with Ennerdale. I also got some of the better quality bags, but they are 4x6. Is that too big to fit into this new box format? If not, I'll send some along.