Mother's Day 2027
Mother's Day size for a baby born in December
A baby born in December 2026 will be about 5 months old on Mother's Day, May 9, 2027.
- Carter's6M
- Old Navy3-6M
- Cat & Jack3-6M
- babyGap3-6M
Typical size that day: about 15.6 lb and 25.4 in.That's spring. Think light layers that work for cool mornings and warm afternoons.
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: 5 months old on Mother's Day
Typical size: about 15.6 lb, 25.4 in long.
- Carter'sConfident match6M
- Old NavyConfident match3-6M
- Cat & Jackcould be 6-9M3-6M
- babyGapConfident match3-6M
- OshKosh B'goshConfident match6M
- Gerber Childrenswearcould be 6-9M3-6M
- The Children's PlaceBelow the smallest verified sizeunder 6-9M
- Wonder Nationcould be 6-9M3-6M
- Cloud Islandcould be 6-9M3-6M
- Little SleepiesConfident match3-6M
- Kyte BabyConfident match3-6M
- Hanna Anderssoncould be 65 cm or 70 cm60 cm
- Burt's Bees BabyConfident match3-6M
- NikeConfident match6M
- Primarycould be 3-6M or 6-9M6-12M
- Posh PeanutConfident match3-6M
- Janie and Jackcould be 3-6M6-12M
- GymboreeBelow the smallest verified sizeunder 12-18M
- Mini BodenConfident match3-6M
- Tea Collectioncould be 3-6M6-9M
- Magnetic Mecould be 6-9M3-6M
- Monica + Andycould be 6-9M3-6M
- Kate QuinnConfident match3-6M
- Bellabu BearConfident match3-6M
- Angel DearConfident match3-6M
- Kickee PantsConfident match3-6M
- L'ovedbabycould be 6-9M3-6M
- PehrConfident match3-6M
Born December 2025: 17 months old on Mother's Day
Typical size: about 22.8 lb, 31.6 in long.
- Carter'scould be 24M18M
- Old Navycould be 12-18M18-24M
- Cat & JackConfident match18M
- babyGapcould be 12-18M18-24M
- OshKosh B'goshcould be 24M18M
- Gerber Childrenswearcould be 24M/2T18M
- The Children's Placecould be 18-24M12-18M
- Wonder Nationcould be 18M or 2T24M
- Cloud IslandConfident match18M
- Little SleepiesConfident match12-18M
- Kyte Babycould be 12-18M18-24M
- Hanna Anderssoncould be 85 cm80 cm
- Burt's Bees BabyConfident match18M
- Nikecould be 12M18M
- Primarycould be 12-18M18-24M
- Posh PeanutConfident match12-18M
- Janie and JackConfident match18-24M
- Gymboreecould be 18-24M12-18M
- Mini Bodencould be 9-12M12-18M
- Tea CollectionConfident match12-18M
- Magnetic Mecould be 18-24M12-18M
- Monica + Andycould be 12-18M18-24M
- Kate Quinncould be 18-24M12-18M
- Bellabu BearConfident match18-24M
- Angel DearConfident match12-18M
- Kickee PantsConfident match18-24M
- L'ovedbabycould be 9-12M12-18M
- PehrConfident match18-24M
Born December 2024: 2 years, 5 months old on Mother's Day
Typical size: about 28.1 lb, 35.6 in tall.
- Carter'sConfident match2T
- Old Navycould be 3T2T
- Cat & Jackcould be 2T3T
- babyGapcould be 3Y2Y
- OshKosh B'goshConfident match2T
- Gerber ChildrenswearConfident match3T
- The Children's Placecould be 2T3T
- Wonder NationConfident match3T
- Cloud IslandPast the largest listed size24M+
- Little Sleepiescould be 3T2T
- Kyte Babycould be 2T3T
- Hanna AnderssonConfident match90 cm
- Burt's Bees BabyConfident match2T
- Nikecould be 3T2T
- Primarycould be 23
- Posh Peanutcould be 3T2T
- Janie and Jackcould be 32T
- Gymboreecould be 2T3T
- Mini Boden2Y, could be 2-3Y, 3Y18-24M, 2Y
- Tea Collectioncould be 2T3T
- Magnetic Mecould be 2T3T
- Monica + AndyPast the largest listed size18-24M+
- Kate Quinncould be 18-24M2T
- Bellabu Bearcould be 2/3T3T
- Angel Dearcould be 2T3T
- Kickee Pantscould be 2T3T
- L'ovedbabyPast the largest listed size18-24M+
- PehrConfident match2T
Born December 2023: 3 years, 5 months old on Mother's Day
Typical size: about 32.9 lb, 38.9 in tall.
- Carter'scould be 4T3T
- Old Navycould be 4T3T
- Cat & Jackcould be 3T4T
- babyGapcould be 4Y3Y
- OshKosh B'goshcould be 4T3T
- Gerber ChildrenswearConfident match4T
- The Children's PlaceConfident match4T
- Wonder NationConfident match4T
- Cloud IslandPast the largest listed size24M+
- Little Sleepiescould be 4T3T
- Kyte BabyConfident match4T
- Hanna AnderssonConfident match100 cm
- Burt's Bees Babycould be 4T3T
- Nikecould be 3T4T
- Primarycould be 34
- Posh Peanutcould be 4T3T
- Janie and Jackcould be 43
- GymboreeConfident match4T
- Mini Boden4Y, could be 2-3Y, 3Y3-4Y, 4Y
- Tea CollectionConfident match4T
- Magnetic MeConfident match4T
- Monica + AndyPast the largest listed size18-24M+
- Kate Quinncould be 4T3T
- Bellabu BearConfident match4T
- Angel DearConfident match4T
- Kickee PantsConfident match4T
- L'ovedbabyPast the largest listed size18-24M+
- Pehrcould be 4T3T
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