Hi everyone -

This is my first post to the forum. I'm delighted this site exists!

I'm working on a website for our company and have come across some questionable wording that was delieverd from our marketing department.

I'm working on a FAQ page - and one of the questions is:

"What is the average size book?"

For some reason, this seems odd, and I've been unable to find anything with Google.

Wouldn't it be better to say:

"What is the average sized book?"

My suggestions usually get shot down, but I am curious to know whether or not "size" or "sized" is correct.
Any suggestions would be appreciated!

My instinct is that 'average-sized' would be the grammatically correct adjective, but that 'size' is in sufficiently common use to be acceptable to most native readers/speakers. Alternatively, I'd be prepared to accept that "the average size book" is an ellision of "the average size [of a] book".

Others may disagree?
Or, my favorite solution - rewrite. What is the size of an average book? or What is the average size of your books?
Teachers: We supply a list of EFL job vacancies

What is the average size of a book?

What is an average-sized book?

Students: We have free audio pronunciation exercises.

Here are some possible answers.

What is the average size of a book?

A - About 8 inches by 4 inches by 1 inch.

A - about 250 pages.

What is an average-sized book?

A - Pride and Prejudice.