Just remember folks...the flu (influenza) is an upper respiratory infection...nausea and vomiting are not symptoms of the flu . ...So many times people say they have the flu but it really is not..
Length x width x height equals volume. * * * * *. But only if the object in question is a cuboid (rectangular prism). Length*Width*Height for a sphere, for example, does not equal its volume.
I agree with height x width too - in newspaper advertising you'd design a 10 x 2 meaning 10 cms deep by 2 columns wide. I use the US notebook paper standard with the width used first: 8.5 x 11. Any other job I've done has the width first, then the height. I would imagine this is standard, as per the example I just quoted. Interesting your client does it the other way!