It holds a junior circa notebook... the refill size paper for the notebooks
Measures 5 5/8" x 8 1/4"

So it is very close. I would say yes... but since I don't have one, someone with access to one should probably confirm... or Ryan. :o)

my artwork

I know this was discussed earlier, but I can't seem to find that discussion. Here's some photo evidence on my flickr account. This is a Junior size Circa notebook with plastic cover and 1/2" discs, Rollabind Junior size pages, and a Franklin Covey Classic size form stuffed in a Rollabind Junior size pocket.

Classic size is just a tad taller, and just a tiny bit thinner. The thinner part doesn't bother me. The taller sticks out a bit from the plastic notebook covers. I don't know about the leather covers. The way most planner pages are, you should be able to chop the bottom 1/4" off and only some blank space.

If you're going to use DIYPlanner forms with your Circa, you'll want to invest in a hole punch and probably a good paper cutter too if you're using anything besides letter size.

-Kenny

Tai,

I combined both sizes of paper in the notebook you were considering to help you visualize the difference.

Link to Flickr set contrasting the two sizes in a translucent notebook [3 photos]

Thanks,
Ryan