My two cents and I’m out.
First, the problem is in your head, not in your pants. You know that. So work on the problem in your head before you think of doing anything to your dick. Where your dick is concerned, you just aren’t thinking properly. If you do something permanent to your penis while you’re thinking is off, you’re stuck with what you get.
Second, your penis affects your wife as much as it does you. If you do something to your dick to make yourself feel better, and exclude her from that choice, you’re liable to find that good sex turn into lousy sex, and it could be something she just can’t get into. Imagine your wife getting surgery to change her face without talking to you first. That would be crazy on her part, but you’re thinking of doing the same thing and hoping she doesn’t notice.
Your current size is irrelevant. Your feeling of being inadequate is the whole issue. Same as 99% of the men here. Very few of us every NEEDED PE, most of us have done it. Deal with your insecurity, and do some natural PE is that makes you feel better in the process. If you go the surgical route as you’re intending, you’ll most likely be unsatisfied with the results.
“I was like, Am I gay? Am I straight? And I realized...I'm just slutty. Where's my parade? What about slut pride?”
― Margaret Cho