This is the cutest suit!!! Always size up when buying bathing suits or end up like me and only getting to wear it twice before having to sell! In such good condition that it’s basically New without tags but we’ve worn and washed twice so it’s EUC! Smoke free home. Thanks for shopping :) there’s no size option for 6-12. The suit is marked 6-12 I’ve listed it at 9-12 because that was my best option. This fit my daughter until she was 14 months and she’s TTS.