This year there’s 3 calendars to choose from: A4, small (between A4 and A5) and a desk calendar
Approximate postage is:
A4: within Australia: $3.30, USA or UK: $13.50, Asia: $8.80
Small: within Australia: $2.20, USA or UK: $8.30, Asia: $5.10
Desk (fits in a DL envelope): within Australia: $1.10, USA or UK: $3.20, Asia: $2.50