A See America travel poster for Fort Marion National Monument, St. Augustine, Florida — the same 1938 WPA/NPS series as the Yellowstone and Grand Canyon pieces. The Ranger Naturalist Service sold every kind of public land the same way: a Spanish colonial fort got the identical confident flat-ink treatment as a wilderness park. The fort’s star-shaped bastion walls reduced to a single hard-edged silhouette. History and wilderness, sold from the same print shop.

Maker: C. Don Powell
Date: 1938
Medium of the original: Travel poster
Original held by: Library of Congress
Credit: Library of Congress · via Wikimedia Commons
Rights: Cleared for print
Catalogue number: PA-00856

As chosen: 18 x 24 in, art print, classic frame
Picture	18 x 24 in
Outside size	19.6 x 25.6 in
Depth	0.9 in (22 mm)
Weight	[[REAL PROOF NEEDED: shipped weight per size and frame]]
Hanging	[[REAL PROOF NEEDED: hanging hardware Prodigi fits to this frame]]
Material	Enhanced matte art paper, 200 gsm; acrylic glazing
Made in	Charlotte, North Carolina, by Prodigi

Before a size goes on sale, the file is measured against it: pixels per inch at that size, how much of the picture a crop would lose, tone and sharpness. A size that fails is not offered, so there is nothing to choose wrong.

How the print check works

Sizes offered
Size	dpi	Grade	How it fits
8 x 10 in	524	Excellent	Trimmed 6.8%
11 x 14 in	381	Excellent	Trimmed 5.1%
12 x 16 in	349	Excellent	Trimmed 0.6%
16 x 20 in	262	Excellent	Trimmed 6.8%
18 x 24 in	233	Excellent	Trimmed 0.6%
24 x 30 in	174	Good	Trimmed 6.8%

Sizes withheld
Size	Why
8 x 12 in	Wrong shape: a 11% crop
12 x 18 in	Wrong shape: a 11% crop
16 x 24 in	Wrong shape: a 11% crop
20 x 30 in	Wrong shape: a 11% crop
24 x 36 in	Wrong shape: a 11% crop
30 x 40 in	139 dpi; a historical scan is never enlarged
36 x 48 in	116 dpi; a historical scan is never enlarged
40 x 60 in	Wrong shape: a 11% crop