Kids Clothing Size Chart: Baby, Toddler, Youth, Height & Weight

Kids clothing size chart covering baby, toddler, little kid and youth sizes with height, weight, chest, waist and fit notes.

Baby clothing size chart by age, weight and length

Use weight and length as the primary fit checks for baby clothing, sleepers and bodysuits.

Size	Weight	Length / height	EU height label	Fit note
Preemie	Up to 5 lb / 2.3 kg	Up to 17 in / 43 cm	Up to 44 cm	Tiny newborn fit; brand ranges vary widely
Newborn	5-8 lb / 2.3-3.6 kg	17-21 in / 43-53 cm	44-56 cm	Short-term size for many full-term babies
0-3M	8-12 lb / 3.6-5.4 kg	21-24 in / 53-61 cm	56-62 cm	Good first size when newborn may be too small
3-6M	12-17 lb / 5.4-7.7 kg	24-27 in / 61-69 cm	62-68 cm	Check sleeper length
6-9M	17-21 lb / 7.7-9.5 kg	27-29 in / 69-74 cm	68-74 cm	Often overlaps 6-12M labels
9-12M	21-25 lb / 9.5-11.3 kg	29-31 in / 74-79 cm	74-80 cm	Measure length before buying footed items
12-18M	25-28 lb / 11.3-12.7 kg	31-33 in / 79-84 cm	80-86 cm	Transition toward toddler sizing
18-24M	28-30 lb / 12.7-13.6 kg	33-35 in / 84-89 cm	86-92 cm	May overlap 2T but cut is often diaper-friendly

Baby brands vary. Month labels usually mean up to that age, so a 6M item may fit many babies before 6 months if they are tall or long-torsoed.

Toddler sizes often keep extra room for diapers and toddler proportions.

Size	Approx age	Weight	Height	Chest	Waist
2T	2 years	28-32 lb / 13-15 kg	33-35 in / 84-89 cm	20-21 in / 51-53 cm	20-21 in / 51-53 cm
3T	3 years	32-35 lb / 15-16 kg	35-38 in / 89-97 cm	21-22 in / 53-56 cm	21-22 in / 53-56 cm
4T	4 years	35-39 lb / 16-18 kg	38-41 in / 97-104 cm	22-23 in / 56-58 cm	22-23 in / 56-58 cm
5T	5 years	39-45 lb / 18-20 kg	41-44 in / 104-112 cm	23-24 in / 58-61 cm	22.5-23.5 in / 57-60 cm

A size 4 can be slimmer than 4T. If potty training or diaper room matters, compare the brand chart before switching from T sizes.

Youth alpha labels bridge little kid sizes and adult XS/S sizing.

Youth label	Approx age	Weight	Height	Chest	Waist
YXS / 4-5	4-5 years	39-49 lb / 18-22 kg	40-45 in / 102-114 cm	22-24 in / 56-61 cm	21-22 in / 53-56 cm
YS / 6-7	6-7 years	49-58 lb / 22-26 kg	45-50 in / 114-127 cm	24-26 in / 61-66 cm	22-23 in / 56-58 cm
YM / 8-10	8-10 years	58-80 lb / 26-36 kg	50-56 in / 127-142 cm	26-29 in / 66-74 cm	23-25 in / 58-64 cm
YL / 12-14	11-13 years	80-115 lb / 36-52 kg	56-64 in / 142-163 cm	29-33 in / 74-84 cm	25-27 in / 64-69 cm
YXL / 16-18	13+ years	115-140 lb / 52-64 kg	64-69 in / 163-175 cm	33-36 in / 84-91 cm	27-30 in / 69-76 cm

Teens may need adult sizes for height or length before chest and waist measurements fully match adult charts.

Measure height with the child standing straight against a wall and shoes off.

Use weight as a secondary check because children with the same age can have very different builds.

For tops and jackets, check chest and sleeve; for bottoms, check waist, hips and inseam.

If a child is between sizes, size up for growth room unless the garment is safety-sensitive or must fit closely.

How do kids clothing sizes work?

Baby sizes often use months, toddler sizes use T labels, and older kids use numbers or youth alpha labels.

What measurement matters most for kids clothes?

Height is often the best first check, then chest for tops and waist/inseam for bottoms.

Why does my child wear different sizes by brand?

Kids brands use different fit models, ease and proportions, so measurements beat age labels.