So, I want to change my profile picture to something else. I have a a couple of questions about getting/changing a profile picture.

1. Can someone change their profile picture once it has been set to something they picked?
2. What criteria does the image need for it to be a profile picture?

1. Yes, you can always change your profile picture at any time.
2. The image size needs to be 500x500 or less pixels and less than 512 kilobytes. Also, it obviously can't be inappropriate or otherwise break the community guidelines. But other than that, you are free to make your profile picture whatever you want.

The image also needs to be a .png, a .jpg/.jpeg, or a .gif.