A See America travel poster for Grand Canyon National Park, silkscreened by the WPA Federal Art Project. Part of the same national "See America" series as the Yellowstone piece — a Depression-era program selling citizens their own public land, in a medium the program itself helped invent as fine art. The canyon’s strata reduced to a handful of flat color bands, each a separate screen pull. A continent, cut down to the size of a print.

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-00855

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	530	Excellent	Trimmed 7.1%
11 x 14 in	386	Excellent	Trimmed 5.5%
12 x 16 in	353	Excellent	Trimmed 1%
16 x 20 in	265	Excellent	Trimmed 7.1%
18 x 24 in	235	Excellent	Trimmed 1%
24 x 30 in	176	Good	Trimmed 7.1%

Sizes withheld
Size	Why
8 x 12 in	Wrong shape: a 10% crop
12 x 18 in	Wrong shape: a 10% crop
16 x 24 in	Wrong shape: a 10% crop
20 x 30 in	Wrong shape: a 10% crop
24 x 36 in	Wrong shape: a 10% crop
30 x 40 in	141 dpi; a historical scan is never enlarged
36 x 48 in	117 dpi; a historical scan is never enlarged
40 x 60 in	Wrong shape: a 10% crop