Approaching Thunder Storm1859Free · sharp to 6.5 × 4.2 in at 300 dpi, uncropped
Hummingbird and Apple Blossoms1875Free · sharp to 12.7 × 11 in at 300 dpi, uncropped
Hummingbird and Passionflowersca. 1875–85Free · sharp to 8.4 × 13.3 in at 300 dpi, uncropped
Newburyport Meadowsca. 1876–81Free · sharp to 12.7 × 5.9 in at 300 dpi, uncropped
Sketch for "Approaching Thunder Storm"Free · sharp to 7.5 × 5.8 in at 300 dpi, uncroppedReading 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 isHummingbird and Apple Blossoms, at 3,795 × 3,285 pixels: enough for a 12.7 × 11 in print at 300 dpi, or 25.3 × 21.9 in at poster sharpness.
The Met flags one of these as a collection highlight: Approaching Thunder Storm.
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.