Did you want the whole sky? Even at A2 it won't show much detail and will be seriously distorted towards the poles - just like a Mercator projection map of the Earth.
Two of the better free sets of free maps available come from Toshimi Taki and Jose Torrres.
Toshimi's
Star Atlas (to mag 6.5) and his
Mag 8.5 Star Atlas.
Jose's
Tri-Atlas
You can print off just those pages which are of interest.
PS. I would have spelled Jose's name with the correct accent but IIS can't cope.