Try Spinfit W1, FiiO HS18, AZLA SednaEarfit XELASTEC, Dunu S&S, etc. ear tips for possibly better fit/seal, noise reduction/isolation, and comfort.

The dimensions/sizing/measurements/etc. for most ear tips these days will be on Amazon/AliExpress/HiFiGo/etc. Unfortunately you have to blind buy the ear tips in order to get a feel for the dimensions/measurement/etc. that you like for your ears. Remember, this will also change with different IEMs as they'll have different nozzle length, nozzle angle, and so on.

More info on DIY IE 900, IE 200, et cetera: https://www.reddit.com/r/HeadphoneAdvice/comments/11qpf1g/recommendation_for_iem_as_closely_similar_in/jc5huke/

Click this sentence for more info on the importance of ear tips sizing, dimensions, et cetera.

Click this sentence for more info on XELASTECs and foam ear tips durability and sound changes.

Click this sentence for comfort and everything with ear tips.

Click this sentence for how to put ear tips on wide nozzles (basically aim it at different angles and force it, be careful not to overdo it as it can damage the core/stem/stalk/etc. of the ear tips).

This is how you should use Etymotics or really any IEM or TWS earbud to make sure you have that good/perfect fit for that vacuum seal (necessary for the bass to be properly produced): https://www.youtube.com/watch?v=8KwXEqe6Gq4

TWS earbuds with ANC, Etymotics, ear tips, small flush low profile shells for better comfort, et cetera for noise reduction: https://www.reddit.com/r/HeadphoneAdvice/comments/126wsel/need_comfy_noice_cancelling_headphones_asap/jeccarq/

Noise reduction with TWS earbuds, IEMs, Bluetooth ANC headphones, et cetera: https://www.reddit.com/r/HeadphoneAdvice/comments/11r4zcl/looking_for_noise_isolating_earbuds_for_a/jc6pbld/