New Year's Day 2027
New Year's Day size for a baby born in December
A baby born in December 2026 will be about 2 weeks old on New Year's Day, January 1, 2027.
- Carter'sNewborn
- Old Navy0-3M
- Cat & Jack0-3M
- babyGap0-3M
Typical size that day: about 8.5 lb and 20.5 in.That's winter. Think long sleeves, footed pajamas, and warm layers.
Worked out for a birth date in the middle of December, a baby in the middle of the WHO growth chart, and room to grow. A birthday early or late in the month, or a baby who is longer or lighter than average, can land a size apart. The calculator below uses the exact date and your measurements. Last updated October 10, 2026.
Born December 2026: 2 weeks old on New Year's Day
Typical size: about 8.5 lb, 20.5 in long.
- Carter'scould be 3MNewborn
- Old NavyConfident match0-3M
- Cat & JackConfident match0-3M
- babyGapConfident match0-3M
- OshKosh B'goshBelow the smallest verified sizeunder 3M
- Gerber ChildrenswearConfident match0-3M
- The Children's PlaceBelow the smallest verified sizeunder 6-9M
- Wonder NationConfident match0-3M
- Cloud IslandConfident match0-3M
- Little Sleepiescould be Newborn0-3M
- Kyte Babycould be 0-3MNewborn
- Hanna AnderssonConfident match50 cm
- Burt's Bees Babycould be 0-3MNewborn
- NikeConfident matchNewborn/0-3M
- PrimaryConfident match0-3M
- Posh Peanutcould be 0-3MNewborn
- Janie and JackConfident match0-3M
- GymboreeBelow the smallest verified sizeunder 12-18M
- Mini BodenConfident matchNewborn
- Tea CollectionConfident match0-3M
- Magnetic Mecould be Newborn0-3M
- Monica + AndyConfident match0-3M
- Kate QuinnConfident match0-3M
- Bellabu Bearcould be 0-3MNewborn
- Angel Dearcould be Newborn0-3M
- Kickee PantsConfident match0-3M
- L'ovedbabyConfident match0-3M
- Pehrcould be 0-3MNewborn
Born December 2025: 13 months old on New Year's Day
Typical size: about 20.8 lb, 29.7 in long.
- Carter'scould be 18M12M
- Old NavyConfident match12-18M
- Cat & JackConfident match12M
- babyGapConfident match12-18M
- OshKosh B'goshcould be 18M12M
- Gerber Childrenswearcould be 18M12M
- The Children's PlaceConfident match9-12M
- Wonder Nationcould be 12M18M
- Cloud IslandConfident match12M
- Little SleepiesConfident match6-12M
- Kyte BabyConfident match12-18M
- Hanna Anderssoncould be 80 cm75 cm
- Burt's Bees BabyConfident match12M
- NikeConfident match12M
- PrimaryConfident match12-18M
- Posh Peanutcould be 12-18M9-12M
- Janie and JackConfident match12-18M
- GymboreeBelow the smallest verified sizeunder 12-18M
- Mini BodenConfident match9-12M
- Tea Collectioncould be 12-18M9-12M
- Magnetic Mecould be 12-18M9-12M
- Monica + Andycould be 12-18M9-12M
- Kate Quinncould be 12-18M6-12M
- Bellabu BearConfident match12-18M
- Angel Dearcould be 12-18M6-12M
- Kickee PantsConfident match12-18M
- L'ovedbabycould be 12-18M9-12M
- Pehrcould be 18-24M12-18M
Born December 2024: 2 years, 1 month old on New Year's Day
Typical size: about 26.3 lb, 34.2 in tall.
- Carter'scould be 24M2T
- Old Navycould be 18-24M2T
- Cat & JackConfident match2T
- babyGapConfident match2Y
- OshKosh B'goshcould be 24M2T
- Gerber Childrenswearcould be 24M/2T3T
- The Children's PlaceConfident match2T
- Wonder NationConfident match3T
- Cloud IslandConfident match24M
- Little SleepiesConfident match2T
- Kyte Babycould be 3T2T
- Hanna Anderssoncould be 85 cm90 cm
- Burt's Bees Babycould be 24M2T
- Nikecould be 18M or 24M2T
- PrimaryConfident match2
- Posh Peanutcould be 18-24M2T
- Janie and JackConfident match2T
- GymboreeConfident match2T
- Mini Boden2Y, could be 12-18M18-24M, 2Y
- Tea CollectionConfident match2T
- Magnetic Mecould be 18-24M2T
- Monica + AndyPast the largest listed size18-24M+
- Kate QuinnConfident match18-24M
- Bellabu BearConfident match2/3T
- Angel DearConfident match2T
- Kickee PantsConfident match2T
- L'ovedbabycould be 12-18M18-24M
- Pehrcould be 18-24M2T
Born December 2023: 3 years, 1 month old on New Year's Day
Typical size: about 31.3 lb, 37.8 in tall.
- Carter'scould be 4T3T
- Old Navycould be 4T3T
- Cat & Jackcould be 4T3T
- babyGapConfident match3Y
- OshKosh B'goshcould be 4T3T
- Gerber Childrenswearcould be 4T3T
- The Children's Placecould be 4T3T
- Wonder Nationcould be 3T4T
- Cloud IslandPast the largest listed size24M+
- Little SleepiesConfident match3T
- Kyte BabyConfident match4T
- Hanna Anderssoncould be 90 cm100 cm
- Burt's Bees Babycould be 4T3T
- Nikecould be 4T3T
- Primarycould be 43
- Posh PeanutConfident match3T
- Janie and JackConfident match3
- Gymboreecould be 4T3T
- Mini Boden3Y2-3Y, 3Y
- Tea Collectioncould be 4T3T
- Magnetic MeConfident match4T
- Monica + AndyPast the largest listed size18-24M+
- Kate QuinnConfident match3T
- Bellabu BearConfident match4T
- Angel Dearcould be 4T3T
- Kickee PantsConfident match4T
- L'ovedbabyPast the largest listed size18-24M+
- PehrConfident match3T
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