Product specifications:
The calendar is printed on 250 gsm / 100 lb semi-gloss silk paper. 
Wall calendar with hook:
A4 vertical (21 x 29.7 cm)
A4 horizontal (21 x 29.7 cm)
Square (21 x 21 cm)
Slim vertical (14.8 x 40 cm)
One page for each month, has one cover page and one back page, printed on double sides, 7 sheets in total.
Hook for easy hanging.

Double-page calendar:

Available in 2 formats:

A4 horizontal (21 x 29.7 cm)
Square (21 x 21 cm)

Two pages for each month (one with the image and one with the month view), has one cover page and one back page, printed on double sides, 13 sheets in total.
A regular spiral with no hook on top.
A small hole is punched through all sheets within the calendar for hanging. The hole is positioned approx 1.4 cm from the edge of the calendar.
When hanging on the wall, the calendar is unfolded so the size is doubled.