5" or 10" fabric squares for guest book quilt?

[MommaChristine]

I finally found a fabric pattern that I like - see it HERE! - and now have a choice between 5" and 10" pre cut squares. I''m going to iron freezer paper to the back so that''s it''s easier to write on and make an outline so that no signatures are lost in the seams .. but which size do you think would be best?!

 

[Clairitek]

5" should suffice.