We got a question recently about the difference between the Trinote, Septanote, and Prenote planner formats. The layout is the same in all three, but they do differ in size. At 8 1/4″ x 11 5/8″, the Prenote is the largest.
The Trinote is slightly smaller, at 7″ x 9 3/8″. And the Septanote, which is the same size as the Trinote, is an academic year calendar.
Also, for those of you who care about colors… it looks like both Trinote and Prenote print the dates in turquoise ink (see above), whereas the Septanote prints them in dark gray.
Hope this helps!