Thanks for joining us on Apple Support Communities, chico215.
You mentioned you just received replacement ear tips for your AirPods Pro, but they aren't fitting correctly. We can help.
First, let's make sure you're using these steps to attach the ear tips correctly: Choose your AirPods Pro ear tips and use the Ear Tip Fit Test. If you find that you are still having concerns regarding the replacement tips, you may want to reach out to the Apple Store Online team for assistance.
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Hope that helps!
Take care.