Trying to figure out why my files are bloating

I am saving a bunch of logos in, among other formats, EPS. The EPS files are saved with these options…

The files contain:

• One unfilled, unstroked path the size of the artboard
• Three squares as guides
• One group consisting of three (or sometimes two) compound paths

That’s it. no yet, no links, no embedded images.

I was provided a sample of some files saved with the same options. Those files are each about 600 KB. My files are about 1 MB when saved in CMYK, but only about 450 KB when saved in RGB. I cannot think of anything to account for the larger file size.

I don’t know if the size will matter to my client, but I do have about 3000 of these files to save. If I can take about 400 KB off the size I will save 1.2 GB of space. Not chicken feed.

Illustrator CC2015

MacOS Sierra

I have tried saving from Illustrator 2017, Illustrator CS6, and Illustrator CS5. No difference.

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