3 month generally fits up to 6 month. 6 month generally fits up to small 12 month.
A similar style starting at size 12 month is also available as a regular float dress here. The item "Quinn Vintage Christening Gown" is in sale since Thursday, November 9, 2017. This item is in the category "Clothing, Shoes & Accessories\Baby\Baby & Toddler Clothing\Christening Clothing". The seller is "strasburgchildren" and is located in Madison, Alabama.This item can be shipped worldwide.