Is 6.1" (15.5cm) length and 5.9" (15cm) girth enough?

Hey everyone. I’m 19, currently a virgin, and honestly pretty nervous about my first time. I keep seeing crazy statistics online and it’s making me question myself.

​I am measuring at about 15.5cm / 6.1" in length, and my girth is around 15cm / 5.9". Is this size enough? For your own pleasure, do you actually prefer something bigger?