14K Yellow Gold Plated, 8 Band Turkish Puzzle ring ( Not hallow or) The ring top part 15 mm (0,59") down part 8 mm (0,31") weight around 10-gram Available size 6 to 14 including half sizes The ring come to you assembled, you can separate and get back together ( please watch youtube video #OFLIUM I m Puzzle ringmaster, I make products my own workshop all size amazon prime shipping " If you have a metal allergy, oxidation can accelerate, if there is a coating or protection in silver jewelry, it can faster and this oxidation could make green your finger"