Hey @pkaushik,
Thank you for joining the Bose Community!
I am sorry that the M/L variant of your Bose Frames Alto is not suitable for you. We're unable to assist with any exchanges or returns via this platform and I would strongly urge you to get in touch with your point-of-purchase. If you purchased them directly through Bose, then please reach out here - Global Contact Us > Select your country > Scroll to the bottom of the page > Click 'Contact Us'
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