I ordered a sample of my "Please Clean Up After Your Pet" on a shiny little acrylic sign.
The artwork features a naughty dog that is smoking- and left a bunch of poo and litter in their wake!
 
The sign is 6x6" and comes with all the hardware needed for hanging. 
There are holes in the corners (it could be hung on nails too.)
Price includes domestic US shipping.
The original painting shown in photo #4 is in my shop here.