Resolution - Print Size Chart The numbers on the chart stand for dots per inch (dpi) they say the human eye does not see much beyond 96 dpi, that should give you a good example of what will work to make a good quality print.
This is why, when you pay for a session and digital images, I give you a limited print release. There is no sense in spending hard earned money on a professional photographer, only to then print your images at Walmart or Walgreens. For Pros- go Simply Color Lab. For Consumers, Mpix is my recommendation. Just check out these quality comparisons... it's insane!
Ideal Image Sizes for Your Blog and Social Media
Ideal Image Size and Formats for Your Blog and Social Media | Elle & Company