Quote Originally Posted by Roger Cole View Post
For whatever reason the US standard for photography has always been to put the short dimension first. 5x4 and 10x8 do sound weird to us, but I imagine 4x5 and 8x10 sound equally odd to people who are used to the other version.
The strange thing is that whilst I always use 5x4, I also usually say 8x10 rather than 10x8 which is a bit odd.

Metric sizes too are normally quoted short side first, whatever the country. e.g. 24mm x 36mm, 6x9, 6,12, etc. These are all vertical first. It would be silly to describe a panoramic camera as 17x6 although entirely logical!

Quote Originally Posted by Steve Smith View Post
All coordinates, graph designations. etc. I can think of always put the horizontal element first.
I seem to have proven myself wrong by finding more exceptions to the rule than things which adhere to it. A bit like the i before e except after c fallacy.