Made by blue collar workers for blue collar workers!. Spread some laughter by sharing our hilarious and sarcastic stickers with your blue collar friends & co-workers!. Grab a multi-pack to save big! With many places to slap this one, you'll want to stock up.. Our USA-made stickers are printed on super sticky, high-quality vinyl to withstand extreme conditions.. 3.5-inch, perfectly sized for your hard hat.