What matters
Medium Profile Photo dimensions at a glance
Medium profile photos appear as small circles next to your articles, in author bios, and in response threads. A 500×500 source keeps it sharp across all contexts.
Your profile photo is your byline visual. Regular Medium readers associate your face/logo with your writing, building audience loyalty.
Low-res images look unprofessional next to polished articles. Non-square uploads get awkwardly cropped into a circle.