The Samantha Glass earings are superb. No two are the same. They do vary slightly in size. Generally 11mm to 13mm. These are more suited for ladies or older girls because of their size. They are a little to large for younger girls. The 9mm are more suitable. I have personally selected the colours that are more suitable for this ladies and girls. They all offer surgical steel posts and/or surgical steel back or plastic/ rubber backs. Waterproof and Nickel free. Handcrafted and Australian Made.