elements do not have explicit width and height

What are these “image elements”? What’s your site address?

studiomarchiebrevetti .it

i saw that sentence in google search control.
you can see better if you do a pagepeed of the site

i also have this problem that you can see in pagespeed:

… Font / icomoon.woff
It is not
89 KiB
… Font / fontawesome-webfont.woff? V = 4.0.0`

?