These are the cutest little stud earrings perfect for any teacher or student for Back to School or year round! I just love them. they are handpainted & sealed with shellac & on surgical stainless steel posts they are approx 1/2" in size The paint has been sealed with a shellac so they are able to handle minimal water such as a dash through the rain but they are not waterproof to the point of submersing in water & I do not recommend showering in them. They are solid wood veneer but the inside is a mdf pressed wood. Back To School Notebook Paper & Pencil Hand Painted Wood Stud Post Earrings