M.W.
What works best for me are the ones that show the days in columns rather then little squares. You see a month at a time and a week at a time. You can find them spiral bound, they have less room for contacts and such, but are much trimmer. I found the Franklin Covey ones (5.5 x 8.5-ish) that have no dates on clearance and stocked up (at Target). The columned ones are harder to find though. My mom uses a full page size one for her appointment book for her counseling practice, so maybe try the appointment book section of an office supply store instead. (makes it easier to cram in everyone's schedule if you have the day times in there already.
Best wishes!