AI giving different dimensions when saving PSD files

[Regina 7]

Would like to understand what is happening here.  I have a PSD file and I flatten it to 4 layers then save the file (but leaving it open in PS)  > I go into Bridge , choose that same saved PSD file and open with AI > Save as AI file.  The resulting AI file size can be wildly different even thought the settings are the same and the file is saved the exact same way.  

Example:

PSD File is 2850 x 2850 @300 ppi

first time I saved this as an AI file is saved as 648 x648 @300 ppi 

When I did it again, same file, same settings, same everything, it saved as the same size as the PSD: 2850 x 2850 @300 ppi

waht is going on here? thanks.

[Regina 7]

yeah, it didn't seem to.  like I mentioned earlier, I was just wanting to undrstand what was happening despite no issues with quality on the the export end.  thank you so much for your help and sticking with me on this and I'll check out the link and Bridge forum.  

[Ton Frederiks]

Thanks, I hope the Bridge experts can help you.