FASHIONDISTRICT

Size reviews · Baby

Baby sizing, brand by brand · Little & Youth

What size is 6–9M?How a 6–9M compares across 29 baby brands — by weight

A 6–9M isn't the same everywhere. Baby sizes are set mostly by weight, and each brand draws its 6–9M a little differently. Here is every brand on Little & Youth that sells a 6–9M, then the brands that call the same weight something else.

The short answer: At the 29 brands on Little & Youth that sell a size called 6–9M, it fits a baby of about 16.5–20 lb, roughly 26.5–28.2 in long — the middle of those brands' own published ranges. Baby sizes are set mostly by weight, then length, so weigh before you buy. Across those brands the same 6–9M spans 15–22 lb. 20 more brands sell a size with a different name whose own published weight overlaps this range; they're listed separately, exactly as each brand prints them.

Brands that sell a size called 6–9M

Each brand's own published weight and length for its 6–9M, lightest to heaviest. Expand "source" for the chart each row comes from.

6–9M across 29 brands — weight (lb) and length (in), as each brand publishes them.
BrandTheir sizeWeightLength
Tea Collection6-9M15–18 lb27–29 in
source
Chart: Newborn Nb To 6-12m · Source: https://teacollection.com/pages/size-chart · Captured: 2026-09-09
Garanimals6-9M16.5–19 lb26.5–27.5 in
source
Source: https://www.garanimals.com/size-chart · Captured: 2026-09-04
Magnetic Me6-9M16–19 lb26.5–28 in
source
Chart: Baby · Source: https://www.magneticme.com/pages/size-chart · Captured: 2026-09-04
Old Navy6-9M17–19 lb26.5–29 in
source
Chart: Baby · Source: https://oldnavy.gap.com/browse/product.do?pid=614457002 · Captured: 2026-09-20
Walmart Wonder Nation6-9M16.5–19 lb26.5–27.5 in
source
Source: https://www.walmart.com/ip/Wonder-Nation-Boys-Kid-Tough-T-Shirt-Sizes-XS-XXL-and-Husky/938545778 · Captured: 2026-09-20
Cloud Island6-9M16.5–19.5 lb26–27.5 in
source
Chart: Baby · Source: https://digitalcontent.target.com/itemcontent/sizecharts/htmlfragments/baby-toddler-clothing/cloud-island/regular.html · Captured: 2026-10-05
Target Cat & Jack6-9M16.5–19.5 lb26–27.5 in
source
Chart: Baby · Source: https://digitalcontent.target.com/itemcontent/sizecharts/htmlfragments/baby-toddler-clothing/cat-jack/regular.html · Captured: 2026-09-20
JoJo Maman Bébé6-9 mths19.8 lb29.13 in
source
Chart: Baby 0 - 24 Months · Source: https://www.jojomamanbebe.com/us/en/sizing-and-care-guide/baby-and-childrens-size-guide · Captured: 2026-09-04
Primark Kids6-9 months19.8 lb26.77–29.13 in
source
Chart: Baby Clothes: Newborn - 36 Months (product-page Size Guide) · Source: https://www.primark.com/en-us/p/0-18mths-disney-pixars-toy-story-newborn-romper-ivory-991181820006 · Captured: 2026-10-07
babyGap6 - 9 mos17–20 lb27–28 in
source
Chart: BABY SIZE CHART · Source: https://www.gap.com/customer-service/size-charts?cid=2105 · Captured: 2026-09-04
Calvin Klein Kids6/9 Months girls16–20 lb26–28 in
source
Chart: Infant Girls · Source: https://www.calvinklein.us/en/kids-size-guide.html · Captured: 2026-09-09
Calvin Klein Kids6/9 Months boys16–20 lb26–28 in
source
Chart: Infant Boys · Source: https://www.calvinklein.us/en/kids-size-guide.html · Captured: 2026-09-09
Gerber Childrenswear6-9M16–20 lb26–28 in
source
Chart: Preemie to Toddler · Source: https://www.gerberchildrenswear.com/pages/size-chart-gerber-childrenswear · Captured: 2026-09-04
Guess6/9M17–20 lb27–28.5 in
source
Source: https://content.guess.com/GuessUS/Frontend/sizechart/kids_sizecharts.html · Captured: 2026-09-04
Hanna Andersson6-9M (65 cm)16–20 lb26–28 in
source
Chart: Baby & Toddler · Source: https://www.hannaandersson.com/kids-size-chart.html · Captured: 2026-09-04
Monica + Andy6-9M16–20 lb26–28 in
source
Chart: Baby Sizes · Source: https://monicaandandy.com/products/oversized-slouchy-tee · Captured: 2026-10-05
Under Armour Kids6-9M16–20 lb27–29 in
source
Chart: Infant · Source: https://www.underarmour.com/en-us/t/size-guide/boys-tops/ · Captured: 2026-09-20
Levi's Kids6/9M16.5–20.5 lb26.5–28.5 in
source
Chart: Kids Baby - NEWBORN · Source: https://www.levi.com/US/en_US/info/sizeguide · Captured: 2026-09-04
Joules Kids6-9m18.1–20.9 lb27–29 in
source
Chart: BABY & TODDLER · Source: https://joulesuk.zendesk.com/hc/en-gb/articles/30459306847505-Size-Guides · Captured: 2026-09-04
Hatley6-9m16–21 lb26.75–28 in
source
Chart: Baby · Source: https://us.hatley.com/pages/size-chart · Captured: 2026-10-05
Hudson Baby6-9M17–21 lb27–28.5 in
source
Chart: Baby Clothing · Source: https://hudsonchildrenswear.com/pages/sizechart.html · Captured: 2026-10-05
Mini Boden6-9Mup to 21 lbup to 29 in
source
Chart: GIRLS & BOYS BODY MEASUREMENTS · Source: https://global.boden.com/pages/childrens-size-and-fit-chart · Captured: 2026-09-04
Gymboree6-9M18–22 lb27–29 in
source
Chart: Baby · Source: https://www.gymboree.com/us/content/size-chart · Captured: 2026-10-07
J.Crew Crewcuts6 - 9 M18–22 lb27–29 in
source
Chart: Baby (Height/Weight/Waist/Chest; no metric table published) · Source: https://www.jcrew.com/r/size-charts · Captured: 2026-09-04
Macy's First Impressions6-9M17–22 lb26.5–28 in
source
Chart: Baby · Source: https://www.macys.com/xapi/digital/v1/product/21640640/sizechart/267301644?clientId=PROS · Captured: 2026-09-20
The Children's Place6-9M18–22 lb27–29 in
source
Source: https://www.childrensplace.com/us/content/size-chart · Captured: 2026-10-07
Mango Kids6-9 months—29.13 in
source
Chart: Newborn — full body ladder (as published under "Pajamas") · Source: https://shop.mango.com/us/en/size-guide · Captured: 2026-09-20
Mayoral6-9M girls—28.74–30.71 in
source
Chart: Newborn Girl | 0-18 months · Source: https://www.mayoral.com/us/en/newborn-girl-3-piece-set-ceramic-1602263067-1/ · Captured: 2026-09-04
Mayoral6-9M boys—28.74–30.71 in
source
Chart: Newborn Boy | 0-18 months · Source: https://www.mayoral.com/us/en/newborn-boy-dungaree-and-sweater-set-mineral-1602603022-1/ · Captured: 2026-09-04
Puma Kids6/9M boys—27–29 in
source
Chart: Boys - Infant + Toddler Clothing · Source: https://us.puma.com/api/graphql · Captured: 2026-09-20
Puma Kids6/9M girls—27–29 in
source
Chart: Girls - Infant + Toddler Clothing · Source: https://us.puma.com/api/graphql · Captured: 2026-09-20
Zara Kids6-9 months—up to 29.13 in
source
Chart: Baby · Source: https://www.zara.com/us/en/textured-floral-print-bodysuit-p05767587.html · Captured: 2026-09-20

Same weight, different label

These brands don't sell a size called 6–9M. Each row is one of the brand's own sizes whose published weight overlaps 16.5–20 lb — shown with the brand's label, weight and length as printed. Labels are the brands' own; we don't treat them as the same size as 6–9M.

Other baby sizes whose own published weight overlaps the 6–9M weight band.
BrandTheir sizeWeightLength
Converse Kids6 Months15–18 lb24.5–26.5 in
source
Chart: Infant & Toddler Apparel · Source: https://www.converse.com/size-chart-guide?id=infantandtoddler-tops&modal=false · Captured: 2026-09-09
Jacadi6M13–18 lb26 in
source
Chart: Baby · Source: https://www.jacadi.us/size-chart · Captured: 2026-09-20
Noralee3m14–18 lb24–27 in
source
Chart: Noralee — Body · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Primary6-915–18 lb25–27 in
source
Chart: All Baby Clothing (rows 2 and 3 omitted - see notes.md) · Source: https://size-chart-server.primary.codes/all-baby-clothing · Captured: 2026-09-09
Quincy Mae3-6m14–18 lb24–27 in
source
Chart: Quincy Mae — Body · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Rylee + Cru3-6m14–18 lb24–27 in
source
Chart: Rylee + Cru — Body (Baby + Kids) · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Polo Ralph Lauren Kids6M14.5–18.5 lb24.5–27 in
source
Chart: Baby Size Guide - Apparel · Source: https://www.ralphlauren.com/baby-size-guide/baby_all_ages_apparel.html · Captured: 2026-09-09
BoxLunch9 Months16–20 lb26–28 in
source
Chart: Infant/Baby · Source: https://www.boxlunch.com/customer-service/merchandise/size-fit-guide/ · Captured: 2026-09-04
Patagonia Kids3-6M15–20 lb25–27 in
source
Chart: Infants & Toddlers Size Chart · Source: https://www.patagonia.com/size-unisex-infant-data.html?format=ajax · Captured: 2026-09-04
The North Face Kids3M-6M15–20 lb25–28 in
source
Chart: Baby Apparel · Source: https://www.thenorthface.com/en-us/help/size-charts · Captured: 2026-09-09
Amazon Essentials Kids9M17–20.5 lb26–27.5 in
source
Source: https://z-ecx.images-amazon.com/images/G/01/apparel/en_US/html/sizechart/kids._V201566742_.html · Captured: 2026-09-20
abercrombie kids9 mos17–21 lb27–29 in
source
Chart: Baby & Toddler · Source: https://www.abercrombie.com/shop/us/kids/p/straight-jeans-56562026 · Captured: 2026-09-04
Burt's Bees Baby9M17–21 lb26.5–28.5 in
source
Chart: Baby/Toddler/Kids · Source: https://www.burtsbeesbaby.com/pages/baby-clothes-size-chart · Captured: 2026-09-04
Carter's9M17–21 lb27–28.5 in
source
Chart: Pajamas (general body ladder) · Source: https://www.carters.com/size-chart · Captured: 2026-10-07
Outerwear chart, same size: 17–21 lb, 26–28 in
Little Planet by Carter's9M17–21 lb27–28.5 in
source
Chart: Pajamas (general body ladder) · Source: https://www.carters.com/size-chart · Captured: 2026-10-07
Outerwear chart, same size: 17–21 lb, 26–28 in
OshKosh B'gosh9M17–21 lb27–28.5 in
source
Chart: Pajamas (general body ladder) · Source: https://www.carters.com/size-chart · Captured: 2026-10-07
Outerwear chart, same size: 17–21 lb, 26–28 in
Converse Kids9 Months18.5–22 lb26.5–29 in
source
Chart: Infant & Toddler Apparel · Source: https://www.converse.com/size-chart-guide?id=infantandtoddler-tops&modal=false · Captured: 2026-09-09
Jacadi12M18–22 lb29 in
source
Chart: Baby · Source: https://www.jacadi.us/size-chart · Captured: 2026-09-20
Janie and Jack6 - 12 m girls17–22 lb25–29 in
source
Chart: Baby Girl - Clothing · Source: https://www.janieandjack.com/janieandjack-size-charts.html?lang=en_US · Captured: 2026-09-04
Janie and Jack6 - 12 m boys17–22 lb25–29 in
source
Chart: Baby Boy - Clothing · Source: https://www.janieandjack.com/janieandjack-size-charts.html?lang=en_US · Captured: 2026-09-04
Janie and Jack6 - 12 m17–22 lb25–29 in
source
Chart: Baby - Clothing · Source: https://www.janieandjack.com/janieandjack-size-charts.html?lang=en_US · Captured: 2026-09-04
Kyte Baby6-12M17–22 lb27–29 in
source
Chart: Infant & Toddler apparel (weight+height) · Source: https://kytebaby.com/pages/sizing-chart · Captured: 2026-09-30
L.L. Bean Kids6-12 Months18–22 lb27–29 in
source
Chart: Kids Sizing - Infants · Source: https://www.llbean.com/llb/shop/518113?page=sizing-charts · Captured: 2026-09-04
Noralee6m18–22 lb27–30 in
source
Chart: Noralee — Body · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Primary6-1215–22 lb25–29 in
source
Chart: All Baby Clothing (rows 2 and 3 omitted - see notes.md) · Source: https://size-chart-server.primary.codes/all-baby-clothing · Captured: 2026-09-09
Primary9-1218–22 lb27–29 in
source
Chart: All Baby Clothing (rows 2 and 3 omitted - see notes.md) · Source: https://size-chart-server.primary.codes/all-baby-clothing · Captured: 2026-09-09
Quincy Mae6-12m18–22 lb27–30 in
source
Chart: Quincy Mae — Body · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Rylee + Cru6-12m18–22 lb27–30 in
source
Chart: Rylee + Cru — Body (Baby + Kids) · Source: https://ryleecru.customerdesk.io/#rp-customer-widget-faq-ebe725ad-f773-4634-bbd6-0c8dd0af7e18 · Captured: 2026-09-13
Little Sleepies6-12m17–23 lb27–31 in
source
Source: https://littlesleepies.com/pages/sizing-guide · Captured: 2026-10-07

Weight, length and the diaper

Two babies of the same age can be two sizes apart, which is why the age on the tag is the weakest guide. Go by weight first, then length. Bodysuits and footed sleepers also have to close over a diaper: if your baby is near the top of a brand's range, is long for their weight, or wears cloth diapers, the next size up usually snaps more easily.

Common questions about 6–9 months sizes

What weight is a 6–9M for?

At the 29 brands on Little & Youth that sell a 6–9M, it fits a baby of about 16.5–20 lb — the middle of their own published ranges. Brands vary: the same 6–9M spans 15–22 lb across them, so check the brand's own weight range.

Is a 6–9M the same at every brand?

No. Baby sizes aren't standardized — across the brands here a 6–9M covers 15–22 lb, and some brands name the same weight differently (a single age like 6M, months like 6 mos, or a centimetre size). Weigh and measure your baby and compare against each brand's own chart.

Know your baby's size at every brand. Let Little & Youth do it.

Enter your baby's weight and length once and Little & Youth shows the size to buy across the brands on the site — each from that brand's own published chart.

Find your child's size →
Their Measurements. Right Size. Brand by Brand.
How we know this is accurate. Every weight and length on this page is transcribed from that brand's own published baby size chart — no estimates and no averaged-out "standard". Where a brand prints only an upper limit ("up to 7 lb"), that is how it is shown. Brands update their charts, so confirm against the brand's live chart before you buy. Little & Youth is independent and not affiliated with any brand listed. Figures verified 2026-10-08.