Join the crew of best party planners and order these Personalized Yellow Construction Hats for your next big bash. Personalize the stickers for these hats with 3 lines of 18 characters/spaces per line. Whether it is to celebrate a grand opening event or a kids’ birthday party, these personalized construction hats will be a huge hit. Plastic. 10 1/4" Not a protective helmet. One size fits most. Simple assembly required to apply personalized sticker.