Petit Bateau size guide

Official chart in centimetres: baby, kids, and women.

Official source: Petit Bateau — recorded on September 30, 2026

About this chart

Petit Bateau publishes separate charts for daywear and for underwear and nightwear, but their values are identical apart from rounding, so only one is shown here. Gloves, scarves and belts are left out: the brand only gives size codes for them (T1 to T7), with no measurements.

Baby

N46 and NAI are two newborn sizes: N46 for a height of 47 cm, NAI (French for "birth") for 50 cm. Size 36M has the same height (95 cm) as kids' size 3A.

Size	Age	Height (cm)	Bust (cm)
N46	—	47	32
NAI	—	50	34
1M	1 months	54	35
3M	3 months	60	40
6M	6 months	67	44
9M	9 months	71	45
12M	12 months	74	46
18M	18 months	81	48
24M	24 months	86	50
36M	36 months	95	52

Socks

International conversions

Petit Bateau	N/1M	3M	6M	12M	18M
Shoe size (EU)	15/16	17/18	19/20	21/22	23/24

Beanies

Size	Age	Head circumference (cm)
N/1M	0–1 months	39–41
3/6M	3–6 months	43–45
12/24M	12–24 months	47–49

Hats and bucket hats

Size	Age	Head circumference (cm)
3M	3 months	43
6M	6 months	45
12/18M	12–18 months	47

Kids

Boys

Size	Age	Height (cm)	Bust (cm)	Waist (cm)	Hips (cm)
2A	2 years	86	50	48	53
3A	3 years	95	52	50	55
4A	4 years	104	54	52	57
5A	5 years	110	56	53.5	59
6A	6 years	116	58	55	61
8A	8 years	128	63	57	68
10A	10 years	140	68	61	77
12A	12 years	152	75	66	81
14A	14 years	164	85	71	88
16A	16 years	176	90	75	94
18A	18 years	182	93	76	96

Girls

The boys' and girls' charts are identical up to age 4, then diverge. The gap becomes clear from age 14: for the same size 14A, Petit Bateau gives a height of 158 cm for a girl against 164 cm for a boy, and 170 against 182 cm in 18A.

Size	Age	Height (cm)	Bust (cm)	Waist (cm)	Hips (cm)
2A	2 years	86	50	48	53
3A	3 years	95	52	50	55
4A	4 years	104	54	52	57
5A	5 years	110	56	53.5	60
6A	6 years	116	58	55	63
8A	8 years	128	64	57	69
10A	10 years	140	70	61	75
12A	12 years	152	78	65	84
14A	14 years	158	83	67	89
16A	16 years	164	85	69	93
18A	18 years	170	87	71	95

Socks

International conversions

Petit Bateau	2A	3/4A	6A	8A	10/12A
Shoe size (EU)	23/24	25/26	27/28	29/30	31/34

Slippers

International conversions

Petit Bateau	2/3A	4/5A	6/7A	8/10A
Shoe size (EU)	24/25	26/27	28/29	30/31

Beanies

Size	Age	Head circumference (cm)
2/4A	2–4 years	49–51
6/8A	6–8 years	53
10/12A	10–12 years	55

Hats and bucket hats

Size	Age	Head circumference (cm)
2A	2 years	49
3/4A	3–4 years	51
6/8A	6–8 years	53
10/12A	10–12 years	55
14/18A	14–18 years	57

Women

Petit Bateau gives the same height (170 cm) to every women's size: only bust, waist and hip measurements tell them apart. Women's sizes continue the teen sizes: 12A matches XXS (34), 22A matches XL (44).

Size	Height (cm)	Bust (cm)	Waist (cm)	Hips (cm)
12A/XXS	170	80	62.5	88.3
14A/XS	170	84	66.5	92
16A/S	170	88	70.8	96
18A/M	170	92	75	99.8
20A/L	170	96	79.5	103.5
22A/XL	170	102	84	109
XXL	170	106.5	89	115

International conversions

Petit Bateau	12A/XXS	14A/XS	16A/S	18A/M	20A/L	22A/XL	XXL
French size	34	36	38	40	42	44	46

Socks

International conversions

Petit Bateau	10/12A	14/16A	18A
Shoe size (EU)	31/34	35/38	39/42