Just because your mother thinks that you should be grown up it doesn't mean that you have to stop playing with Lego.
These earrings are cast from a real piece of Lego, so are the same size as the real thing.
I also have other sizes and pendants.
I make all of my jewellery, so if you want something you see in a slightly different design, or in a different material, I can very probably make it happen.