11×8.5  
Template for 11 by 8.5 inch signs, letter paper size and printable with most printers. These signs are exhtremely small but can be printed cheaply and quickly

14×8.5  
Template for 14 by 8.5 inch signs, legal paper size and printable with most printers. These signs are exhtremely small but can be printed cheaply and quickly

17×11  
Template for 17 by 11 inch signs, ledger/tabloid and printable with medium format printers.

18×12  
Template for 18 by 12 inch signs, a common corrugated plastic size

22×14  
Template for 22 by 14 inch signs, perhaps the most common posterboard size

24×18  
Template for 24 by 18 inch signs, the most common corrugated plastic size

26×16  
Template for 26 by 16 inch signs, the most common polybag size

24×18  
Template for 28 by 22 inch signs, a common posterboard size

96×48  
Template for 96 by 48 inch signs