I posted the design of this on my Facebook page and lost two page likes as a result so I guess sometimes the trash takes itself out huh?
This pin has a blue background with some pale pink squares. The text is hand lettered in black and reads "vaccinate your damn children". If you don't (I understand sometimes you CAN'T but that isn't what I'm talking about here) you're ignorant and you're putting vulnerable people at risk.
These badges are 58mm (2.25") in size (photographed next to a 5p which is roughly the same size as a US dime to show scale). They're super durable (I've even put mine in the wash by mistake and it survived, though I really wouldn't recommend it).