12 months
What size for the first birthday?
At 12 months, a baby in the middle of the WHO growth chart is about 20.5 lb and29.5 in. The label that fits depends on the brand, as the list shows. For a closer answer, add the birth date and current measurements in the calculator.
The first birthday size, brand by brand
- Carter'sConfident match12M
- Old Navycould be 6-12M12-18M
- Cat & JackConfident match12M
- babyGapcould be 6-12M12-18M
- OshKosh B'goshConfident match12M
- Gerber ChildrenswearConfident match12M
- The Children's Placecould be 6-9M9-12M
- Wonder Nationcould be 12M18M
- Cloud IslandConfident match12M
- Little SleepiesConfident match6-12M
- Kyte Babycould be 6-12M12-18M
- Hanna AnderssonConfident match75 cm
- Burt's Bees BabyConfident match12M
- Nikecould be 9M12M
- Primarycould be 9-12M12-18M
- Posh Peanutcould be 6-12M9-12M
- Janie and Jackcould be 6-12M12-18M
- GymboreeBelow the smallest verified sizeunder 12-18M
- Mini Bodencould be 6-9M9-12M
- Tea CollectionConfident match9-12M
- Magnetic MeConfident match9-12M
- Monica + Andycould be 12-18M9-12M
- Kate Quinncould be 12-18M6-12M
- Bellabu Bearcould be 9-12M12-18M
- Angel DearConfident match6-12M
- Kickee Pantscould be 9-12M12-18M
- L'ovedbabyConfident match9-12M
- Pehrcould be 6-12M12-18M
Which season will it be?
The size is the same for every birth month. The sleeves are not.
- Born in JanuarywinterFirst birthday in January. Think long sleeves, footed pajamas, and warm layers.
- Born in FebruarywinterFirst birthday in February. Think long sleeves, footed pajamas, and warm layers.
- Born in MarchspringFirst birthday in March. Think light layers that work for cool mornings and warm afternoons.
- Born in AprilspringFirst birthday in April. Think light layers that work for cool mornings and warm afternoons.
- Born in MayspringFirst birthday in May. Think light layers that work for cool mornings and warm afternoons.
- Born in JunesummerFirst birthday in June. Think short sleeves, rompers, and breathable fabrics.
- Born in JulysummerFirst birthday in July. Think short sleeves, rompers, and breathable fabrics.
- Born in AugustsummerFirst birthday in August. Think short sleeves, rompers, and breathable fabrics.
- Born in SeptemberfallFirst birthday in September. Think long sleeves and layers that are easy to add or remove.
- Born in OctoberfallFirst birthday in October. Think long sleeves and layers that are easy to add or remove.
- Born in NovemberfallFirst birthday in November. Think long sleeves and layers that are easy to add or remove.
- Born in DecemberwinterFirst birthday in December. Think long sleeves, footed pajamas, and warm layers.
Exact answer
Enter the birth date
Start with a birth or due date
Sizes for each brand you pick will appear here, ready for the date you choose.