I had 6 inch girth and never realized until today

Hey so I have a very slightly above average length, but my girth is 6 inches.
The first time I ever had sex I could not actually put it inside this really petit 5'1 girl I was dating. Being a virgin back then I thought that there was something wrong. Not enough foreplay, I'm doing something wrong etc.

Fast forward 10 years later & my girlfriend always tells me you're so big please go easy and I always believed she was just glazing me. Because I never looked at myself as being big due to my mostly average length.

But I measured my girth today for the first time and I wasn't fully erect yet but pretty close and it was 6 inches. According to gemini that's top 1%. Which I really struggle to believe, I always assumed I had average girth.

Anyone with a similar girth had a similar experience?