Good for you. By the way, I am talking about the Solo loop, not braided. Maybe that one fits better on people's wrist or is more forgiving.
I measured a 10. Got a 10 braided loop and it fits perfect.
I measured a 6. Got a 6 from FedEx today and it is perfect! Slightly snug actually. Go figure! The 5 would be uncomfortably tight on me.