Is it possible to get larger penis size in three weeks? It's not impossible, as long as we talk about 1 inch or nearly one inch growth in three weeks, if using penis enlargement pills. Now you know which PE method will help you increase your penis size in three weeks, but here comes the tough part - to choose the penis enlargement pills that will work best for you. You might also wonder which companies are good and deserve your trust, and which ones to avoid, what ingredients you should be looking for and so on.