Dude, you're right there with the rest of us. According to Medical News Today, the average erect penis size is 5.1 inches. https://www.medicalnewstoday.com/articles/271647.php Mine is 5.2 inches, fully stretched, and not once has a woman complained to me about it. And do you know how easy it is to photoshop a flashlight?
If your wife hasn't already told you, it's not how much you have, it's how you use it. Don't fixate on your size, just try to pleasure the woman you're with, you'll be fine.