About

Baby Size By Date answers one question: what size will this baby be wearing on a specific date, in a specific brand?

Baby clothes are usually bought ahead of time: for a holiday, a birthday, a family photo, or as a gift. By the time the day arrives, the baby has grown, and a 6M in one brand is not a 6M in another. The site puts the date first, projects growth with public health data, and reads the answer from each brand's own size chart.

What the site does

• Size on a date: the likely size, and the range it could be, for any event or date.
• Brand vs brand: one brand's size translated into another's, with the overlap shown.
• Gift planner: a link families can share so gift givers see the right sizes, with nothing to sign up for.
• Brand database: 28 current brands, each with sources and retrieval dates.

How the site is run

• Free to use. There is nothing to buy and nothing to sign up for.
• No accounts, no email capture, no analytics, and no cookies. See the privacy page.
• Independent. The site is not affiliated with any clothing brand. See the disclaimer.
• Open about method. The methodology page explains every step and its limits.