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Quoth · 01-08-2020, 05:02 AM

It's not specifically European, it's ISO.
The Root 2 ratio allows making large panels and cutting to a mix of panel sizes etc.
USA is less than 13% of world population. The Letter size isn't mathematically logical.

There are B sizes as well as A sizes.

Maybe Aliens use 1:sqrt(2) for video as it's so mathematically logical. Laptops and Tablets at 16:9 also suit video best, not documents and desktop. I'd love a 16" laptop with 2172 x 1536.

At 300 dpi, the diagonal is about 222 mm or about 8.8" for 2172 x 1536.

01-08-2020, 05:02 AM	#72
Quoth Still reading Posts: 14,389 Karma: 107076273 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	It's not specifically European, it's ISO. The Root 2 ratio allows making large panels and cutting to a mix of panel sizes etc. USA is less than 13% of world population. The Letter size isn't mathematically logical. There are B sizes as well as A sizes. Maybe Aliens use 1:sqrt(2) for video as it's so mathematically logical. Laptops and Tablets at 16:9 also suit video best, not documents and desktop. I'd love a 16" laptop with 2172 x 1536. At 300 dpi, the diagonal is about 222 mm or about 8.8" for 2172 x 1536. Last edited by Quoth; 01-08-2020 at 05:09 AM. Reason: 300 dpi