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Nike Swim Size Chart

Swimwear can be a challenge to buy online, because fit really matters here. You want a swimsuit that stays put in front of a firehose and perfectly flatters your shape. Never fear; our Nike size charts are here to help.

If you already know your standard women's, girls' or boys' US swimsuit size, check out our women's, girls' or boys' size conversion charts to find the equivalent Nike size. The boys' and girls' size conversion charts also allow for approximate sizing by height and age.

For more precise sizing, follow our measuring guide for men's clothing or our measuring guide for women's clothing to measure your bust/chest, waist, hip, and torso. Then compare your body measurements to the tables below to find your perfect Nike swimwear size. We have measurement charts for women's one-piece swimsuits, women's separates (such as board shorts and bikinis), men's trunks and shirts, men's briefs, boys' swimwear, and girls' swimwear. Make sure to consult the specific chart you want!

When you've found your size, visit our Nike swim collection to shop for high performance men's, women's, and children's Nike swimwear from Outdoor Equipped today!

Nike Women's Swimsuit Size Conversion Chart

Nike Women's Numeric Size Nike Women's Alpha Size US Women's Size
20   GRL 5
22   GRL 6
24   0
26 XS 0
28 S 2
30 S 4
32 M 6
34 L 8
36 L 10
38 XL 12
40 XXL 14
42   16

Nike Women's One-Piece Swimsuit Size Measurement Chart

Nike Women's Numeric Size Bust Waist Hip Torso
20 22.5 - 23.5 in 21.75 - 22.25 in 23.5 - 24.5 in 39.5 - 41.5 in
22 23.5 - 25 in 22.25 - 22.75 in 24.5 - 26 in 41.5 - 43.5 in
24 28.5 - 30.5 in 22.75 - 24 in 31.5 - 33.25 in 55.25 - 57 in
26 30.5 - 32.5 in 24 - 25.5 in 33.25 - 35 in 57 - 58.75 in
28 32.5 - 34.5 in 25.5 - 27 in 35 - 36.75 in 58.75 - 60.5 in
30 34.5 - 36.5 in 27 - 28.5 in 36.75 - 38.5 in 60.5 - 62.25 in
32 36.5 - 38.5 in 28.5 - 30 in 38.5 - 40 in 62.25 - 64 in
34 38.5 - 40.5 in 30 - 31.5 in 40 - 41.5 in 64 - 65.75 in
36 40.5 - 42.5 in 31.5 - 33 in 41.5 - 43 in 65.75 - 67.5 in
38 42.5 - 44.5 in 33 - 34.5 in 43 - 44.5 in 67.5 - 69.25 in
40 44.5 - 46.5 in 34.5 - 36 in 44.5 - 46 in 69.25 - 71 in
42 46.5 - 48.5 in 36 - 37.5 in 46 - 47.5 in 71 - 72.75 in

Nike Women's Separates Size Measurement Chart

Nike Women's Alpha Size Bust Waist Hip Torso
XS 31.5 - 33.5 in 24 - 26 in 34.5 - 36.5 in 55 - 57.75 in
S 33.5 - 35.5 in 26 - 28 in 36.5 - 38.5 in 57.75 - 60.5 in
M 35.5 - 37.5 in 28 - 30 in 38.5 - 40.5 in 60.5 - 63.25 in
L 37.5 - 40.5 in 30 - 33 in 40.5 - 43.5 in 63.25 - 66 in
XL 40.5 - 43.5 in 33 - 36 in 43.5 - 46.5 in 66 - 68.5 in
XXL 43.5 - 46.5 in 36 - 39 in 46.5 - 49.5 in 68.5 - 70.25 in

Nike Men's Trunks and Shirt Size Measurement Chart

Nike Men's Alpha Size Chest Waist Hip
XS 32.5 - 35.5 in 26 - 29 in 32 - 35 in
S 35.5 - 38.5 in 29 - 32 in 35 - 38 in
M 38.5 - 41.5 in 32 - 35 in 38 - 41 in
L 41.5 - 44.5 in 35 - 38 in 41 - 44 in
XL 44.5 - 47.5 in 38 - 41 in 44 - 47 in
XXL 47.5 - 50.5 in 41 - 44 in 47 - 50 in
3XL 51 - 54 in 44 - 47 in 50 - 53 in
4XL 54 - 57 in 47 - 50 in 53 - 55 in

Nike Men's Briefs Size Measurement Chart

Nike Men's Numeric Size Waist Hip
28 27 - 29 in 35 - 37 in
30 29 - 31 in 37 - 39 in
32 31 -33 in 39 - 41 in
34 33 - 35 in 41 - 43 in
36 35 - 37 in 43 - 45 in
38 37 - 39 in 45 - 47 in
40 39 - 41 in 47 - 49 in

Nike Boys' Swimwear Size Conversion Chart

Nike Boys' Alpha Size US Boys' Numeric Size Age Nike Men's Numeric Size Equivalent Height
Little Boys        
XS 4 3 - 4   38 - 41 in
S 5 4 - 5   41 - 43.25 in
M 6 5 - 6   43.25 - 45.5 in
L 7 6 - 7   45.5 - 48 in
Big Boys        
XS 6 - 7 6 - 7 22 47 - 51 in
S 8 - 9 8 - 9 22 - 24 51 - 55 in
M 10 - 12 10 - 11 24 - 26 55 - 59 in
L 14 - 16 12 - 13 26 - 28 59 - 63 in
XL 18 - 20 14+ 28 63 - 67 in

Nike Boys' Swimwear Size Measurement Chart

Nike Alpha Size Chest Waist Hip
Little Boys      
XS 20.75 - 22 in 21.25 - 22 in 22 - 23.25 in
S 22 - 23.25 in 22 - 22.75 in 23.25 - 24 in
M 23.25 - 24 in 22.75 - 23.25 in 24 - 24.75 in
L 24 - 24.75 in 23.25 - 23.5 in 24.75 - 26 in
Big Boys      
XS 25.5 - 26 in 23.5 - 24 in 27 - 28 in
S 26 - 27 in 24 - 25.5 in 28 - 29.5 in
M 27 - 29.5 in 25.5 - 27 in 29.5 - 31.5 in
L 29.5 - 32 in 27 - 28.5 in 31.5 - 33.5 in
XL 32 - 35 in 28.5 - 29.5 in 33.5 - 35 in

Nike Girls' Swimwear Size Conversion Chart

Nike Girls' Alpha Size US Girls' Numeric Size Age Nike Women's Numeric Size Equivalent Height
Little Girls        
XS 4 3 - 4   38 - 41 in
S 5 4 - 5   41 - 43.25 in
M 6 5 - 6   43.25 - 45.5 in
L 6X 6 - 7   45.5 - 48 in
Big Girls        
XS 6 - 7 6 - 7 22 - 24 47 - 51 in
S 8 - 9 8 - 9 24 51 - 55 in
M 10 -12 10 - 11 24 - 26 55 - 59 in
L 14 - 16 12 - 13 26 59 - 63 in
XL 18 - 20 14+ 28 63 - 67 in

Nike Girls' Swimwear Measurement Chart

Nike Alpha Size Bust Waist Hip Torso
Little Girls        
XS 20.75 - 22 in 21.25 - 22 in 22 - 23.25 in 37 3/8 - 39.25 in
S 22 - 23.25 in 22 - 22.75 in 23.25 - 24 in 39.25 - 41.25 in
M 23.25 - 24 in 22.75 - 23.25 in 24 - 24.75 in 41.25 - 42 5/8 in
L 24 - 24.75 in 23.25 - 23.5 in 24.75 - 26 in 42 5/8 - 43.75 in
Big Girls        
XS 25.5 - 27 in 23.5 - 24 in 27 - 29 in 43.25 - 46.25 in
S 27 - 29 in 24 - 25 in 29 - 31 in 46.25 - 49.25 in
M 29 - 31 in 25 - 27 in 31 - 33 in 49.25 - 52.75 in
L 31 - 33.5 in 27 - 28 in 33 - 35 in 52.75 - 56.75 in
XL 33.5 - 36.5 in 28 - 29.5 in 35 - 37 in 56.75 - 60.75 in