Periodic Table of Elements Kippah/Yarmulke All the elements on a black background, perfect for the Chemist or lover of Breaking Bad Get your Science on! Placement of elements may vary slightly approx. 5" inches in diameter One size fits all (adults and children) Kippot are made of 100% cotton. They are unlined and lightweight. If you prefer a lined kippah please add the optional lining add on