I use the 3.5" stippling panto all the time. I have also used the 4.5" steam panto and meander panto. Sometimes I just free hand it to, to use the entire space of my machine (although I'm not very good at that lol). I love using my pantos though. There is someone else on here that can use up to 5.5" ones. I have not been brave enough for that yet lol.