Kids Clothing Size Charts: Boys & Girls (US, UK, EU)

Kids’ clothing sizes are inconsistent. A 6T at one brand fits like an 8 at another. Age-based labels don’t account for tall, slim, or husky builds. The fix is to measure the child once, then match those numbers to a chart.

This guide gives you US, UK, and EU size charts for boys and girls from preemie through 14, plus pants charts and an international conversion table.

How to measure a child for clothing

Use a soft tape measure. Take measurements over light clothing or none at all.

Chest: Wrap around the fullest part with arms at the sides.
Waist: Measure the narrowest part of the torso, usually just above the belly button.
Hips: Measure the fullest part around the seat.
Inseam: Measure from the crotch to the ankle along the inside of the leg.
Height: Stand the child barefoot against a wall and measure floor to top of head.

For toddler and infant sizes, height and weight matter more than chest or waist. For older kids, all five measurements help.

Toddlers and small kids size chart

The “T” stands for toddler. In this age group, sizes are unisex.

Size (age)	Height (inches)	Weight (pounds)
Preemie	Up to 17	Up to 5
Newborn	17½ to 21	5½ to 7½
0 to 3 months	20½ to 23	6½ to 12
3 to 6 months	23½ to 26	12½ to 16
6 to 9 months	26½ to 28	16½ to 19
12 months	28 to 29½	19½ to 22
18 months	30 to 31½	22½ to 26
24 months	32 to 33½	26½ to 30
2T	32 to 33½	26½ to 30
3T	34 to 37½	30½ to 34
4T	38 to 41½	34½ to 38
5T	42 to 44½	38½ to 42

Girls standard size chart (ages 3–12)

General Size	US Size	Height (in)	Chest (in)	Waist (in)	Hips (in)
XS	4	39 to 41½	23	21	23
XS	5	42 to 44½	24	21½	24
S	6	45 to 46½	25	22	25½
S	6X	47 to 48½	26	23	26½
M	7	49 to 50½	27	24	28
M	8	51 to 53	28	25	29½
L	10	53½ to 55	29	26	30½
L	12	55½ to 57½	30½	27	32
XL	14	58 to 60	31½	28	33
XL	16	60 to 62	33	29	34½
XXL	18	60 to 62	34	30	35½
XXL	20	60 to 62	35½	31	37

Girls plus size chart

For girls who measure above standard. Same age band (3–12).

US Size	Height (in)	Chest (in)	Waist (in)	Hips (in)
7 Plus	49 to 50½	28	27	30½
8 Plus	51 to 53	29½	28	31½
10 Plus	53½ to 55	30½	29	33
12 Plus	55 to 57	32	30	34
14 Plus	58 to 60	33	31	35½
16 Plus	60 to 62	34½	32	36½
18 Plus	60 to 62	35½	33	37½

Girls slim size chart

For girls who measure below standard.

US Size	Height (in)	Chest (in)	Waist (in)	Hips (in)
7 Slim	49 to 50½	25½	22	25
8 Slim	51 to 53	26½	23	27½
10 Slim	53½ to 55	27½	24	28½
12 Slim	55 to 57½	29	25	30
14 Slim	58 to 60	30	26	31
16 Slim	60 to 62	31½	27	32½
18 Slim	60 to 62	32½	28	33½

Boys standard size chart (ages 3–12)

General Size	US Size	Age	Height (in)	Chest (in)	Waist (in)	Hips (in)
XS	4	3 to 4	39 to 41½	23	21	23
XS	5	4 to 5	42 to 44½	24	21½	24
S	6	5 to 6	45 to 47½	25	22½	26
S	7	6 to 7	48 to 49½	26	23½	26
M	8	7 to 8	50 to 52	26½	24½	27½
L	10	8 to 9	52½ to 55½	27	25½	28½
L	12	9 to 10	56 to 58	28	26½	30
XL	14	10 to 11	58½ to 60	29½	27½	31½
XL	16	11 to 12	61 to 64	31	29	33
XXL	18	12 to 13	64½ to 66½	32½	30	34

Boys husky/plus size chart

For boys with measurements above standard.

US Size	Height (in)	Chest (in)	Waist (in)	Hips (in)
8 Husky	49 to 51	30	29	30½
10 Husky	51½ to 54½	30½	30	31½
12 Husky	55 to 57	31½	31	33
14 Husky	57½ to 59½	33	32	34½
16 Husky	60 to 63	34½	33½	36
18 Husky	63½	36	34½	37

Boys slim size chart

US Size	Height (in)	Chest (in)	Waist (in)	Hips (in)
8 Slim	50 to 52	25½	21½	25½
10 Slim	52½ to 55½	26½	22½	26½
12 Slim	56 to 58	27	23½	28½
14 Slim	58½ to 60½	28½	24½	30½
16 Slim	61 to 64	30	25½	32
18 Slim	64½ to 66½	32½	26½	33

Boys pants size chart (ages 2–7)

US Size	Alpha Size	Age	Weight (lbs)	Height (in)
2T	2T	2 years	24 to 29	33 to 35
3T	3T	3 years	29 to 33	35 to 38
4T	4T	4 years	33 to 37.5	39 to 41
4	S(4)	3 to 4	37.5 to 42	44
5	M(5)	4 to 5	42 to 46	45 to 47
6	L(6)	5 to 6	46 to 53	48 to 49
7	XL(7)	6 to 7	53 to 58	50 to 52

Girls pants size chart (ages 2–7)

US Size	Alpha Size	Age	Weight (lbs)	Length (in)
2T	2T	2 years	24 to 29	33 to 35
3T	3T	3 years	29 to 33	35 to 38
4T	4T	4 years	33 to 37.5	39 to 41
4	S(4)	3 to 4	37.5 to 42	42 to 44
5	M(5)	4 to 5	42 to 46	45 to 47
6	L(6)	5 to 6	46 to 53	48 to 49
6X	XL(6X)	6 to 7	53 to 58	50 to 52

Boys pants size chart (ages 7–14)

US Size	Age	Height (in)	Chest (in)	Waist (in)	Hips (in)
S(8)	7 to 8	50 to 53	27 to 28	23 to 24	28
M(10–12)	8 to 9	54 to 57	28.5 to 30	24 to 25	29
M(10–12)	10 to 11	58 to 60	30 to 31	25.5 to 26.5	30
L(14–16)	11 to 12	61 to 63	31 to 32	26.5 to 28	31 to 32
L(14–16)	12 to 13	64 to 65	33 to 34	28 to 29	33 to 34
XL(18–20)	13 to 14	65 to 66	34 to 35	29 to 30	34 to 35
XL(18–20)	14+	66 to 67	35 to 36	30 to 31	35 to 36

Girls pants size chart (ages 7–14)

US Size	Age	Height (in)	Bust (in)	Waist (in)	Hips (in)
S(7–8)	6 to 7	51 to 52	26 to 27	22.5	28
S(7–8)	7 to 8	53 to 54	27 to 28.5	23.5	29
M(10–12)	8 to 9	55 to 56	28.5 to 29.5	24.5	30
M(10–12)	10 to 11	57 to 59	30 to 31	25.5	31 to 32
L(14)	11 to 12	60 to 62	31 to 32	26.5	33 to 34
XL(16)	12 to 13	63 to 64	33 to 34	27.5	35 to 36

US to UK and EU size conversion

EU sizes are based on the child’s height in centimeters. UK sizes line up roughly with the child’s age in years.

US Size	Age	Height (in)	Height (cm)	EU Size	UK Size
2T	2	36 to 38	92 to 98	92 to 98	2 to 3
3T to 4T	3 to 4	38 to 41	98 to 104	98 to 104	3 to 4
5	4 to 5	41 to 43	104 to 110	104 to 110	4 to 5
6	5 to 6	43 to 46	110 to 116	110 to 116	5 to 6
6X to 7	6 to 7	46 to 48	116 to 122	116 to 122	6 to 7
7 to 8	7 to 8	48 to 50	122 to 128	122 to 128	7 to 8
9 to 10	8 to 9	50 to 53	128 to 134	128 to 134	8 to 9
10	9 to 10	53 to 55	134 to 140	134 to 140	9 to 10
11	10 to 11	55 to 57	140 to 146	140 to 146	10 to 11
14	11 to 12	57 to 60	146 to 152	146 to 152	11 to 12

Tips for getting the fit right

Measure every 3–4 months for kids under 5. Growth spurts are fast and a 2T can become 3T in 60 days.
Size up, not down. Kids grow into clothes; loose is fine, tight gets donated next month.
Note brands that fit well. Carter’s runs a touch large. H&M and Zara run small. Old Navy and Gap track close to the standard chart.
Check the size guide on the brand’s product page. Most retailers publish their own measurements that may differ from the standard.
For shoes, separate chart applies — kids’ shoe sizing uses foot length in inches/centimeters, not clothing size.

FAQs

What’s the difference between 24M and 2T?

24M (24 months) is for babies still in diapers — cut roomier in the seat and shorter in the leg. 2T is for toddlers out of diapers, with a slimmer fit and longer legs.

Why does the same size fit differently across brands?

There is no enforced US standard for kids’ clothing sizing. Each brand sets its own block patterns, and many cut for their target customer’s build (Carter’s = average, Cat & Jack = slightly larger, H&M = slightly smaller).

How do I convert US 8 to EU?

A US size 8 generally maps to EU 122–128, based on a child of about 48–50 inches tall.

Is the “T” the same as “M”?

No. T = toddler (2T, 3T, 4T, 5T). M = months (3M, 6M, 12M, 18M, 24M). T sizes assume the child is potty-trained.

What size for a tall, slim kid?

Use the slim chart. Many brands carry slim cuts in pants — match the chest size to the chart, then check the inseam.

What size for a husky kid?

Use the husky/plus chart. Match waist and chest first; height follows.

Was this helpful?

Size Charts For Kids – Clothing Sizes For Boys And Girls