like spinfit w1/cp155/145 or divinus velvet

ye I use spinfits, dunus double flange tips, fiios double flange tips, fiio foam tips, dunu foam tips(my favourite most of the time but I can’t wear it with wire nozzle stuff, it puts to much pressure to my ear canals) but those won’t make it any narrower if he wants something narrower, that was my point, spinfits you can wear shallower and I could see that helping tho

Zero Red have wide nozzle, you won’t get anything noticeably smaller than small tips they give you, if they don’t fit look for different IEMs :/

I’ve had both CHU and CHU II, CHU II sound much better but they are both very uncomfortable for me too, I am sensitive to 3kHz frequency most chi-fi brands love to emphasize, my current go-to IEMs are CVJ Mirror, they used to be $98 when they came out in 2021 but you can get them for ~$45 these days, sound completely different from CHU(II) and fits me much better, nozzle is a bit wide so I prefer different tips than compared to some other IEMs I used in the past