For reference only. Fit may vary depending on materials and manufacturer.

Infants, Toddlers, & Kids
Size	Alpha	Height in Inches	Weight in lbs	Chest in Inches	Waist in Inches
Newborn		up to 18"	up to 7 lbs	up to 15	up to 15
0-3m		18-22"	7-11 lbs	15 - 16 1/2	15 - 18
3-6m		22-25"	11-15 lbs	16 1/2 - 17 1/2	18 - 18 1/2
6-9m		25-27"	15-18 lbs	17 1/2 - 18	18 1/2 - 19
9-12m		27-29"	18-22 lbs	18 - 18 1/2	19 - 19
12-18m		29-31"	18-26 lbs	18 1/2 - 19 1/2	19 - 19 1/2
18-24m		31-33"	22-29 lbs	19 1/2 - 20 1/2	19 1/2 - 20
2	XXS	33-35"	26-29 lbs	20 1/2	20
3	XXS	35-38"	29-33lbs	21	20 1/2
4	XS	38-42"	33-37 lbs	22	21
5	S	42-45"	37-43 lbs	23	21 1/2
6	S	45-48"	43-50 lbs	24	22
7	M	48-51"	50-57 lbs	25	22 1/2
8	M	51-54"	57-67 lbs	27	23
10	L	54-57"	67-75 lbs	28 1/2	24
12	L	57-60"	75-85 lbs	30	25
14	XL	60-62"	85-100 lbs	31 1/2	26

Women
Size		Bust in Inches	Waist in Inches	Hips in Inches
XXS	0	32 1/2	25	35
XS	2	33 1/2	26	36
S	4	34 1/2	27	37
	6	35 1/2	28	38
M	8	36 1/2	29	39
	10	37 1/2	30	40
L	12	39	31 1/2	41 1/2
	14	40 1/2	33	43
XL	16	42 1/2	35	45
	18	44 1/2	37	47
XXL	20	46 1/2	39	49
	22	48 1/2	41	51

Women - Plus Sizes
Size		Bust in Inches	Waist in Inches	Hips in Inches
1X	20W	47	43 1/2	49
	22W	49	45 1/2	51
2X	24W	51	47 1/2	53
	26W	53	49 1/2	55
3X	28W	55	51 1/2	57
	30W	57	53 1/2	59

Men
Size	Alpha	Chest in Inches	Waist in Inches
26	XS	32	26
28	S	34	28
30	S	36	30
32	M	38	32
34	M	40	34
36	L	42	36
38	L	44	38
40	XL	46	40
42	XL	48	42
44	XXL	50	44
46	XXL	52	46
48	3XL	54	48
50	3XL	56	50
52	4XL	58	52
54	4XL	60	54

Adult Unisex Sizing
Size	Men (Chest in Inches)	Women (Size)
XS	30-32	0
S	34	2-4
S	36	6-8
M	38	10
M	40	12
L	42	14
L	44	16
XL	46	18
XL	48	20
XXL	50	22
XXL	52	24
3XL	54	26
3XL	56	28
4XL	58	30
4XL	60	32