I’m also going to suggest going down an IEM research rabbit hole, but I’ve got some specific reasons why. I think a big misconception is that this style earbud goes IN your ear. They do not. IEMs go in the opening of your ear canal. This means a few things. The wires over your ear should be doing the primary lifting. Take some time to mold the wires to sit snugly over and behind your ear. Next is the rubber/foam ear tips. These should probably be bigger than you’d expect since the goal isn’t to shove them into your ear, it’s to make a seal against the opening of your ear canal.

Someone else mentioned Crinacle and his channel is a great resource. I have two pairs of IEMs from Truthear, one that was a recommendation of his for the price point and another that is his collab with Truthear. I like them both, but I use the first one, the Hexa, a lot more purely because they live plugged into my desk and the other, the zero blue 2, is for my hi-fi portable audio player.

Not saying these are the end-all-be-all, best choice, just that they were my introduction to IEMs and I’ll never go back to other wired headphones.

I use cheap 10 dollar Pioneer buds. They sit in my ear better than more expensive models.

Audio Technica make some really small and comfortable ones that sound good.

KZ ZST

I absolutely love the Apple 3.5mm wired earpods. I have several spare for when apple decides it's bored of them and stops supply.

Is this what you have?

What is your source? DAP, phone?

You can take a peak on here: https://crinacle.com/rankings/iems/ just to have an idea of brands and prices.

Etymotic er2se/er3se.

What’s your budget?

SoundMAGIC E10

Great sound quality and cheap

Btw head-fi.org for good headphone recommendations, forum is great.

I've been using and quite enjoy the Letshuoer S12 Pro. IEMs though...

But they sound great!

Maytak audio is fantastic.

Veclan monk

The cheapest ones. Go to Temu, sort by price, and get the second cheapest one.