I would just use the catarina mosaic.

Yes, you can cut it down. With a good blade on the wet saw it will look better than the mosaic they provide. It's not hard, but it takes time and you will need to set up a jig to make sure they are all consistently sized.

I was wondering the same thing!
I just saw a post by Tharonk where she posted a herringbone floor in 6x12. We are planning on using the AO 12x12 for a small bathroom floor. I was wondering if I cut the 12x12 down can I get a similar look?

If not I will use the 12x12 in a running bond pattern.

PPS7- I love how your floor came out. How is the tile holding up after all this time? Cleanup? Do you have to mop a lot?
And what color grout and spacing did you use on main floor with the 12 x12. Looks like it is a tight grout line.

Thanks so much!

I just happen to find this picture of the 12 x 12 American Oleon Catarina tiles installed in Kitchen and Bath Ideas Magazine ,Page 127 April 2012.
Looks very nice!Sorry for the bad picture, it was from my phone.