I'm 12 and I'm 5 inches erect, is that normal?

I'm 2 inches soft and 5 hard, is that about average or do I need to increase it somehow?

5" hard is actually bigger than average for a 12 year old. The average male is about 5.75" and the average for your age is like 3.75". I'm 13 and have 6". As for increasing, try jelqing?

The average erect penis size is 6 inches. You still have several years to grow so you are going to be just fine. But if you want to maximize your potential down there, you should use one of those penis health cremes every day. These are basically multi-vitamin cremes made just for the penis and will ensure that it is getting everything it needs to grow properly and stay clean, smooth and functional. These cremes are great. You can get them online.