Board Thread:General Discussion/@comment-24788627-20140408111036/@comment-5109358-20140728210301

Well, they are shape shifters, so their appearances are just 'prefered.' But since the typical form is a humanoid, they have body limitations. Such as when Pearl got stabbed or when Amethyst got food poisoning from that disgusting burrito. The appearance, function, and size of the body is up to the gem.