Most of our letters do not have nail holes for hanging.
Some products we suggest for hanging your Initially Speaking letters are:
3M Command strips
The poster strips may work for the lighter fonts. The picture hanging strips may be better for the heavier fonts as they each hold up to three pounds. Command strips will not damage your walls.
Scotch Foam Mounting Squares
The 1" mounting squares can be cut into smaller pieces and placed in several places on your letters. These are permanent and will remove wall paint when taken down. Each 1" square holds up to two pounds.
There are several brands of poster putty available. You can put as much as needed to hold your letters in place. Poster putty is reusable and will not damage your walls.