Judge fit during the activities you actually do, at a comfortable volume, and within the seller’s return terms.
Read the fitting instructions
Check how the manufacturer intends the earbuds to sit and which supplied tips or fittings can be changed. Follow its fitting procedure rather than forcing a fit that feels uncomfortable. If the product causes pain or irritation, stop using it and seek appropriate advice instead of treating discomfort as a normal adjustment.
Try an ordinary session
Use the earbuds during a normal seated activity first, then during the movement you expect in everyday use. Keep the test safe and avoid situations where reduced awareness creates a hazard. Note pressure, slipping, and whether you repeatedly adjust them.
Separate fit from other impressions
Evaluate comfort before deciding whether a sound setting makes the product exciting. Try supported fitting options one at a time and keep notes. A short first impression may differ from a longer session, so use the return period deliberately without assuming the seller accepts opened products.
Decide from the repeatable result
Write down the setup that feels secure and comfortable. Check whether replacement fittings are available and how the manufacturer recommends cleaning them. If no supported arrangement works, consider a different design. Keeping a product that requires constant adjustment is unlikely to become more convenient simply because its specification list is impressive.
A fitting result is not a universal tip size
Some models include an app-based seal test. Apple, for example, documents different fitting tests for supported AirPods Pro generations. Follow the procedure for your exact earbuds rather than assuming another model uses the same menu or tip design. A test result can support a fitting decision, but comfort during your normal session still matters.
Try one supported change at a time and note the result for each ear. Do not assume both ears need an identical size, and do not force a tip that hurts. If one arrangement feels secure while sitting but repeatedly slips during ordinary movement, record that limitation. Check replacement-tip availability and opened-product return terms before treating an attractive purchase price as a reason to keep an uncomfortable fit.
Sources & method
AI-assisted editorial guidance checked against the primary references below. Examples are illustrative exercises, not results from product tests. No hands-on testing or independent performance measurement is claimed.