As far as I understand, the secret of sound is in the form of earplugs. I dismantled one (I have 4 pairs of these, on average the 1st lasts for a year) The diameter of the speaker is like that of plug-ins, while the form factor of the plugs, in others it is half as much. Size doesn't really matter, but bigger is better than smaller.
🎧 HUAWEI Freebuds 4i: Wireless Earbuds with Active Noise Cancelling & 10H Battery Life in Black
279 Review
🎧 Huawei FreeBuds Pro Earbuds with Advanced Noise Cancellation, Bluetooth 5.2, and 3-Mic System for iOS and Android (Carbon Black)
295 Review
🔴 Sleek Mystic Red Samsung Galaxy Buds Live with Active Noise Cancelling - Wireless Earbuds
274 Review
Huawei Freebuds Pro MermaidTWS with Active Noise Cancellation - Silver Frost
299 Review
Purple Philips SHE3590PP/28 In-Ear Headphones - Superior SEO
189 Review
Massdrop x Koss Porta Pro X On-Ear Headphones: 🎧 Noise-Cancelling Mic, Voice Assistant, Track Skip | Collapsible Midnight Blue
314 Review
Sony MDR-ZX310AP ZX Series Blue Wired On Ear Headphones with Mic: Immersive Sound Experience
48 Review
Panasonic RP-HS46 Slim Clip-Type Earphones in White: Quality Sound On-the-Go
76 Review