There are two different sizes for calendars (4 x 6 cm or 5,5 x 7 cm = 1.6 x 2.4 or 2.2 x 2.8 inch). You can currently purchase calendars for both 2018 and 2019. All calendars are combinable with all motives, no matter the size. They contain 365 sheets and have e.g. poems or recipes printed on the back side (in German).