Printing extremely small photos (5–6 mm) in high quality any advice?

Hi everyone,

I’m working on an art project where I need extremely small photos (around 5–6 mm), but still with very high detail and sharpness.

My current idea is to print a larger sheet containing many small images and then cut them out.

Does anyone have experience with something like this?

And can anyone recommend a place or service that can print at very high resolution for this?

Thanks a lot!