A Typical English Home: Printable Halloween Labels For Bottles And Jars
Printable Halloween Labels for Bottles and Potions Harry Potter Potions Lab Labels
"Dragon's Eggs" Bottle Label
15 Large Halloween Apothecary Labels 4.5 x 2.23 by VectoriaDesigns
This blog has by far the BEST selection of Halloween label art I have seen yet!
Link isn't great, just use the picture for ideas
Printable Halloween Labels for Bottles and Potions Large Halloween Bottle Labels – Fantasy Jr.
Halloween label for invite, card, tag... Love the crackled finish