Second this. I’ve previously had to stick to MICH type helmets and cut the pads in half.
I did manage to find some off the market thinner than usual pads that worked with a fast helmet for me before but having recently done exactly as above I can confirm it’s the best fitting and most comfortable option I’ve tried.
I’m at 60cm when I’ve avoided the barber for a while (59cm with the normal short-back-and-sides) and the PTS Flux fits me like a glove. The pads feel like memory foam, so they compress nicely when they need to, and don’t when they don’t