At the newsagent in front of the Colosseum Metro Station Exit - ground level (there is only one exit, just in front of the monument) street address is: Via dei Fori Imperiali in front of the Colosseum. Your tour guide will be holding a sign with your name.
You can cancel up to 24 hours in advance of the experience for a full refund.
Price varies by group size
up to 24 hours before the experience starts (local time)