Einstein Image Download ((new)) Here

Not all image sites are created equal. Depending on your needs, here are the top tiers for your search: Public Domain & Open Access (Free)

Because of his contributions to physics, NASA’s digital galleries often feature Einstein images in relation to space exploration. Stock Photography (Commercial Use) einstein image download

Look for images at least 2000px wide for printing. Not all image sites are created equal

When you find an image you like, don't just "Right-Click > Save As" the thumbnail. several have entered the public domain.

Since many photos of Einstein were taken over 70 years ago, several have entered the public domain.