A hamburger flat back stud?! Come on! Mix and match with the other food-themed studs in this collection. Sold individually. Colors available: 18K PVD Gold Plated, Stainless Steel/Titanium (dark silver)Measurements: Post measures 1/4 inch (6mm) in length, with a 3mm disc on back (note that this is smaller than many of the backs to our flat back studs). 20 GA (0.8 mm). Hamburger shape is approx. 7.5x6.9mm. Check your own ear measurement before ordering. Materials: This is a single push-pin, threadless flat back stud. Front piece is stainless steel, back post (the part that goes inside your ear) is ASTM F136 implant grade titanium. Care: These are tarnish-proof and waterproof, with proper care. If you come into contact with chlorine or salt water, cream, lotion, perfumes, etc., rinse in water and gently dry with a lint-free cloth. When not wearing, store in a dry, cool place. Avoid leaving this stud in extreme heat, as it can affect the enamel.