Mother's Day 2027
Mother's Day size for a baby born in September
A baby born in September 2026 will be about 8 months old on Mother's Day, May 9, 2027.
- Carter's9M
- Old Navy6-12M
- Cat & Jack6-9M
- babyGap6-12M
Typical size that day: about 18.1 lb and 27.3 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 September, 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 September 2026: 8 months old on Mother's Day
Typical size: about 18.1 lb, 27.3 in long.
- Carter'sConfident match9M
- Old NavyConfident match6-12M
- Cat & Jackcould be 12M6-9M
- babyGapcould be 3-6M6-12M
- OshKosh B'goshConfident match9M
- Gerber ChildrenswearConfident match6-9M
- The Children's PlaceConfident match6-9M
- Wonder Nationcould be 12M6-9M
- Cloud Islandcould be 12M6-9M
- Little SleepiesConfident match6-12M
- Kyte Babycould be 3-6M6-12M
- Hanna AnderssonConfident match70 cm
- Burt's Bees BabyConfident match6-9M
- NikeConfident match9M
- Primarycould be 6-12M9-12M
- Posh PeanutConfident match6-12M
- Janie and JackConfident match6-12M
- GymboreeBelow the smallest verified sizeunder 12-18M
- Mini BodenConfident match6-9M
- Tea Collectioncould be 6-9M9-12M
- Magnetic Mecould be 9-12M6-9M
- Monica + AndyConfident match6-9M
- Kate Quinncould be 3-6M6-12M
- Bellabu BearConfident match6-9M
- Angel Dearcould be 6-9M6-12M
- Kickee PantsConfident match6-12M
- L'ovedbabycould be 9-12M6-9M
- PehrConfident match6-12M
Born September 2025: 20 months old on Mother's Day
Typical size: about 24.1 lb, 32.8 in long.
- Carter'sConfident match24M
- Old NavyConfident match18-24M
- Cat & Jackcould be 18M or 2T24M
- babyGapcould be 2Y18-24M
- OshKosh B'goshConfident match24M
- Gerber ChildrenswearConfident match24M/2T
- The Children's PlaceConfident match18-24M
- Wonder NationConfident match2T
- Cloud Islandcould be 18M24M
- Little Sleepiescould be 18-24M or 2T12-18M
- Kyte Babycould be 2T18-24M
- Hanna AnderssonConfident match85 cm
- Burt's Bees Babycould be 18M24M
- NikeConfident match18M
- Primarycould be 218-24M
- Posh Peanutcould be 18-24M12-18M
- Janie and Jackcould be 2T18-24M
- GymboreeConfident match18-24M
- Mini BodenConfident match12-18M
- Tea Collectioncould be 18-24M or 2T12-18M
- Magnetic MeConfident match18-24M
- Monica + AndyConfident match18-24M
- Kate Quinncould be 12-18M18-24M
- Bellabu Bearcould be 2T or 2/3T18-24M
- Angel Dearcould be 18-24M or 2T12-18M
- Kickee Pantscould be 2T18-24M
- L'ovedbabycould be 18-24M12-18M
- PehrConfident match18-24M
Born September 2024: 2 years, 8 months old on Mother's Day
Typical size: about 29.4 lb, 36.5 in tall.
- Carter'scould be 3T2T
- Old Navycould be 2T3T
- Cat & JackConfident match3T
- babyGapcould be 2Y3Y
- OshKosh B'goshcould be 3T2T
- Gerber ChildrenswearConfident match3T
- The Children's PlaceConfident match3T
- Wonder NationConfident match3T
- Cloud IslandPast the largest listed size24M+
- Little Sleepiescould be 2T3T
- Kyte Babycould be 4T3T
- Hanna Anderssoncould be 100 cm90 cm
- Burt's Bees Babycould be 3T2T
- Nikecould be 2T3T
- PrimaryConfident match3
- Posh Peanutcould be 2T3T
- Janie and Jackcould be 2T3
- GymboreeConfident match3T
- Mini Boden3Y, could be 18-24M, 2Y2-3Y, 3Y
- Tea CollectionConfident match3T
- Magnetic Mecould be 4T3T
- Monica + AndyPast the largest listed size18-24M+
- Kate Quinncould be 3T2T
- Bellabu Bearcould be 4T3T
- Angel DearConfident match3T
- Kickee Pantscould be 4T3T
- L'ovedbabyPast the largest listed size18-24M+
- Pehrcould be 3T2T
Born September 2023: 3 years, 8 months old on Mother's Day
Typical size: about 34.1 lb, 39.6 in tall.
- Carter'scould be 3T4T
- Old Navycould be 3T4T
- Cat & JackConfident match4T
- babyGapcould be 3Y4Y
- OshKosh B'goshcould be 3T4T
- Gerber ChildrenswearConfident match4T
- The Children's PlaceConfident match4T
- Wonder NationConfident match4T
- Cloud IslandPast the largest listed size24M+
- Little Sleepiescould be 3T4T
- Kyte BabyConfident match4T
- Hanna AnderssonConfident match100 cm
- Burt's Bees Babycould be 3T4T
- NikeConfident match4T
- PrimaryConfident match4
- Posh Peanutcould be 3T4T
- Janie and Jackcould be 34
- GymboreeConfident match4T
- Mini Boden4Y3-4Y, 4Y
- Tea CollectionConfident match4T
- Magnetic MeConfident match4T
- Monica + AndyPast the largest listed size18-24M+
- Kate Quinncould be 3T4T
- Bellabu BearConfident match4T
- Angel DearConfident match4T
- Kickee PantsConfident match4T
- L'ovedbabyPast the largest listed size18-24M+
- Pehrcould be 3T4T
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