Just can't decide? Get 1 of each! The Skull Bee, Black Phillip and Stay In Bed for $5!
They measure from 2" by 2" to 2" by 1.25". Made from thick, durable vinyl that is waterproof, UV protected, can last outdoors up to 5 years with a permanent adhesive. I have had a one of these on my car for about 4 years and can attest to its durability.