What’s the biggest dick you’ve encountered, and what is actually your ideal size?

What’s the biggest dick you’ve ever seen in real life, and how was that experience? What was the actual measurement, and what do you consider your ideal size to take?

I’m asking because I want to get some perspective from the other side. I’ve had a few guys refuse to let me top them because they say my size intimidates them. To me, it just feels like "a bit big," nothing crazy. I’m sitting at 20 cm (around 7.8 inches), and in my mind, "actually big" starts at 9+ inches—though I fully admit my perception is probably warped by porn.

Bottoms, has size ever been a dealbreaker for you? How do you view 20 cm in the real world vs. what we see online?