Reading the board
Each card shows the largest print the Met's file makes at 300 dpi without cropping — that's the sharpness you'd want for something you'll stand close to. The biggest file in this set isThe Ambassadors, at 30,000 × 29,560 pixels: enough for a 100 × 98.5 in print at 300 dpi, or 200 × 197.1 in at poster sharpness.
Every page has a size chart against standard frames, the museum record, and the frame and light that make a print look like it cost more than it did. The file itself is free. It always was.