I have no experience CC'ing, so take it for what it's worth, but... For those of us on the wide side, how CAN you prevent printing if you are a jeans and T-shirt type person?
Every choice is a compromise, there's no perfect gun/holster for every situation.
1. First of all, the smaller the gun, the easier it is to conceal it. A P3AT can be slipped into a jeans or shirt pocket and not be noticed. Pocket holsters are not such a bad idea. The drawback, of course, is that you have a small gun.
2. Consider something like an ankle holster perhaps. Or one of the fanny packs designed for CC. You'll gain in concealment, but lose out in time it takes to draw your gun.
3. Thunderwear! Drawback, your gun is pointing at your nuts.
4. Wear a Hawaiian shirt over the T-shirt. Drawback, weather dependent somewhat. Might not be the fashion statement you want.
5. There is a concept of open concealment too. If you have a black gun and black holster, black clothes make the gun less noticeable. Any combination of clothing design that blends with your gun and holster makes it less noticeable.
6. Inside the waist holsters conceal better than belt holsters. But you need to buy pants with a waist size a couple inches greater than your normal size. That's my excuse for my ever increasing pants size.
7. Lastly, just get wider and lumpy. Nobody will know what's what.
Clothing choice becomes an important issue, particularly with CC. Not just for the sake of concealment, but also for the sake of being able to draw without interference from the clothing. I tend wear safari jackets with inside drawstrings. It didn't take long to discover the tendency to grab the string along with the gun when I drew my gun. The simple solution was to pull the drawstring to the other side of the jacket so there was no length on the right side. The moral of the story is you have to choose carefully and then experiment with your clothing to discover any potential interference. The middle of a gunfight is not the best place to learn that your clothing interferes with your gun handling, such or drawing. Nor is the best time to learn a new skill, such as one-handed reloads. Practice practice practice, experiment. Dry fire!