Flat Back Earring Buying Guide
Three numbers pick your earring. Gauge, where 16G is the cartilage standard and 18G to 20G suits daintier piercings and lobes. Post length, where 1/4" is snug and 5/16" is roomy. And the closure, either internally threaded screw-tops or threadless push-ins, both smooth through the piercing. Every product page lists all three.
Steel leads here for a reason. 316L surgical steel is the workhorse, durable and cheap enough to collect, and it's what most healed ears wear happily for years. Sensitive ears trade up to titanium. Anniversaries trade up to gold.
Narrow it down: