They’re round, they’re vinyl, and they’re 3.5″ diameter. Suitable for bikes, cars, laptops, doorposts, mantels, ice chests, books, coffins, monitors, phone cases, household appliances, boxes, etc.
Because shipping is a pain in the tuchas, these are sold in minimum orders of 10 for $10, via PayPal. Includes shipping in USA only.
Update May 2018: Soon to be available at the Seder-Masochism Merchandise Empire, once I build it. Please stand by.