100% original. No size, but I would guess it to be about size 55 or 56. Unpacked weight is 0.22kg. Used condition. The cap badge is a little off centre, but that would be an easy fix.
Airmail Worldwide (outside of Europe): US$16
Surface Mail Worldwide (outside of Europe): US$11
Airmail Europe (outside of the UK): US$11
1st Class Mail UK: £3.60