Thank you everyone. I really like the key designs you have suggested. Now to decide which one. Currently their "lid" says Bathroom Key, so I am thinking of making basically a large tag with the key design stitched on it and adding the word Bathroom. I can make the tag as a freestanding applique, and insert a grommet at the top for the "ring".
Thank you again for your help...you're the greatest :-D :-D