what is the right font number of words and pages for a book of poems.
I'd use a 12 font. Nothing too fancy. Number of words and pages are optional. If your poems are a linked set then just go with that. If not, I'd say most poetry books have around 100 poems. But it depends how you want them published. I've seen poems in pamphlets which contain about 20 poems. Have a look in your local library - this will give you an idea of how to lay out a poem and how many you'll need.
normally 12 or 14