I have the Stone 3/8 " tattoo pliers that are supposed to hold 4 digits. I ordered it as a set with the alphabet (which does say it is 3/8th") and I cannot get 4 digits to fit properly. I have managed to cram them in...my herd tattoo is 4 letters so I really need it to work. Last kid I did they all popped out and went flying and it broke one of the tabs off a letter! So I was wondering if anyone knows if the 5/16" letters will fit in these pliers. Then I'd just order the letters I need. Or I was thinking of just getting the smaller set of pliers so I could keep my herd tattoo in there all the time. The 5/16 says it will hold up to 5 digits so I thought that would be safe. Do ya'll think 5/16 is too small for nubian ears? Its really starting to annoy me!