Well, when you order wood do you ask for a 2 x 4 or a 4 x 2?
We had this argument before in a long thread about 3 years ago or so.
It seems that we in the US use 2 x 4 for wood and construction, and 4 x 5 uniformly for film, but in the UK they use 2 x 4 for wood and construction, but 5 x 4 for film and some other measurements. At least this is what I have distilled out in my memory.
So, what is right? Color or colour? How do you justify the silent "u"? (Oh, this is OT from the other thread too which degenerated into a good natured?? meleee.)