If I was purchasing these earrings for myself, they would be much too small.  They are the perfect size for my 8-year-old daughter who I was purchasing them for.  She wanted earrings just like mommy.  She is thrilled and I am thrilled as they are similar to a larger size version I purchased from Amazon for myself last year.  I think they would be too small for 16 years-old and up, but they are perfect for your 'tween.