Originally Posted by Devious Rhesus
It appears the general consensus is to get the next size up, right?
Yes...unless your objective is to go racing as mentioned by Smooth where most would opt for one frame size down which BTW belies the upright cruising nature of an OCR.
Almost 6'5" clearly correlates to a Giant XL. Work with the shop if the bike is brand new. Also...if you have more of a racing versus touring spirt...test ride a TCR in XL which will have a shorter steerer tube and get you more aero even on an XL.
Good Luck,
George