These Grav 12 mm Taster Pipes I found to be the Perfect size for a 1 hitter and the Best!! They hold the right amount of flower, Easy to see product since they are clear, Easy to Clean, Right Length for Holding Comfortably!! Everything about them is Wonderful!! I hunted these down when I no longer could find them locally! I'm So Happy I found them again that II ordered 3 boxes! LoL! Product always ships quickly and is carefully packaged so not to get broken! Love these pipes and Love this Place!