This is an old water transfer decal that is approximately 8-1/2" x 11" in size. Please note that old decals may become brittle with age. This was stored in a cabinet where the room dark most of the day.
There are suggestions online of how to handle old decals. One thing you probably want to do is to scan it so that you have the image should the transfer not work. That way you can use the image to make an ink jet decal on white vinyl paper. Another suggestion is to soak the decal only long enough that it moves easily off of the paper backing.