How big can you stretch your ears before they wont go back to normal?

usually the range is 2g - 0g but it all depends on your methods of stretching it, your bodies healing, and alot of other things. If you went size by size its more likely to close more than it would be if you skipped sizes. And it also depends on the person, i've known people that had 1/2" gauges and took them out and you could barely tell they ever had them in. If you want them to close to normal size and you stretched them correctly i wouldnt go over a 0g but its all up to your body if you want to be safe you can, if you want to take a risk go for it. There is always a surgery that can close up your ears no matter how big they are

Generally around 2g-0g, but everyone is different. It also depends on how fast you stretched, if you stretched properly, and if you took good care of your lobes.