Are you talking about In ear monitors or earbuds?

The one on the left is a earbud, and they usually have poorer isolation but better soundstage than in ear monitors (IEM) (on the right) that go into the ear canal. IEMs conversely have better isolation but poorer soundstage in general.
Also, personally I wouldn't recommend gear with a mic button as it is an added point of failure and they usually affect resistance in that side of the cable and may affect sound quality to some extent.
If it is IEMs you are looking for, some good sets within your budget that I can recommend are:
1)
**** - around $16 - 17 USD. Triple driver hybrid. Poor isolation but good soundstage. Rather balanced in tuning, good instrument separation, clarity, details. Timbre a bit artificial but it is only apparent for genres that use acoustic instruments. If it's mostly EDM, rock, pop genres, it is a very cheap and good set. It can be driven from a smartphone based on specs, but does better with amping, with the treble being brighter and more detailed/dynamic with amping (the piezo drivers used for the treble frequency do appreciate more juice).
2)
TRN IM2 - around $15 - 20 USD. Built like a tank (nice resin shell), great isolation and comfort. V shaped, good details and clarity and instrument separation. My only complaints are it is too V shaped, so mids are a bit sucked out and the timbre is artificial like the above ****.
3) I've read good reviews on the
Venture Electronics Bonus IE. Haven't tried it myself but worth checking out, around $20 USD. It had a non detachable cable (unlike the above 2), so I skipped it, that might be a point of failure down the road in my experience.
4)
CCA C10 - sub $30 USD. check out reviews, quite all rounded. I don't have it personally, but reviews look quite good.
5)
TRN V90 - has rave reviews on headfi, V shaped, good bass and good details/instrument separation/details. It can be around $30 USD during sales, usually around $50. I think this is one of the better recent CHIFI releases.
6)
Sony MH755 - great sound and timbre, harman tuned. Non detachable cables, short and microphonic, so might need an extension cable or mods. Otherwise around $5 USD. Super bang for buck. A lot of fakes (especially black coloured ones), so check with the rest/reviews on legit sellers.
7)
BLON BL-03 - around $25 - 28 USD. great timbre/tonality, good for acoustic instrument predominant genres. Also a big hypetrain on CHIFI headfi thread now. It isn't that good in technicals, so not the best for complex instrumentation/multiple competing instruments or those wanting a more analytical sound. But the tuning is excellent, harmanish with midbass boost. Isolation lacking and it has poor stock tips +/- cables, so will need some aftermarket tips for most westerners due to the too short nozzle. As such, it may not be the best recommendation for new IEM users who don't know how to tiproll. But if u can switch tips/cables, the sound can compete with some $100 USD IEMs IMHO.
All the best in your search! Hope others can chime in too with their recs. If u are looking for earbuds (picture of the left), let us know, there's lots of recommendations for those too, but it's a totally different rabbithole.