This Bathroom Rules sign is perfect for your bathroom.  The bathroom rules are:  

Wash your hands
Brush your teeth
Flush the toilet
Put the seat down
Turn the light off
Beards are cool
Mullets are not
Guests: Don't get naked. That's weird.

The image has a nice wood grain background, is quality printed on card stock, and affixed to a 5" x 5" x 1/8" slice of poplar wood.  This can either be stuck to a wall or used as a shelf sitter.  For wall mounting, a strip of double sided tape is already included on the back of the sign.  Simply peel away the top layer of the tape and stick it on the wall, or alternatively you could use your own tape, sticky tack, etc. To use as a shelf sitter, just lean it up against anything on your shelf.