Wow, that's surprising especially as that's what they deliver when you ask for a pint, and charge pint prices for it while delivering 5-6oz less
Thanks for measuring that.
Russian River serves 16oz pints and what they call "half-pints" which are 10oz. That's the glass for the small one. It's what they were serving Younger in when I went in February. I asked for a small pour of Elder to compare and it came in the 10oz size. They called it a "tiny Pliny."
For reference, on their menu they charge $4.50 for a pint and $3.25 for a half-pint as seen here: http://russianriverbrewing.com/pub-menu/