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Size Guide USA

Splash About Size Guide

Find the perfect fit for your swimming needs

Happy Nappy Products

Happy Nappy

Size Waist Thigh
(Small) 0 – 3 m 13.4 - 16.1 in 6.7 - 8.7 in
(Medium) 3 – 6 m 14.6 - 17.3 in 7.5 - 9.4 in
(Large) 6 – 12 m 15.7 - 18.5 in 7.9 - 10.2 in
(X Large) 1 – 2 y 16.5 - 19.7 in 8.7 - 12.2 in
(XX Large) 2 – 3 y 17.3 - 20.5 in 10.2 - 13 in
3 – 4 y 18.9 - 21.3 in 10.6 - 13.8 in
4 – 5 y 22 - 24.4 in 11.4 - 15.6 in

Happy Nappy Duo

Size Waist Thigh
(Small) 0 – 3 m 13.4 - 16.1 in 6.7 - 8.7 in
(Medium) 3 – 6 m 14.6 - 17.3 in 7.5 - 9.4 in
(Large) 6 – 12 m 15.7 - 18.5 in 7.9 - 10.2 in
(X Large) 1 – 2 y 16.5 - 19.7 in 8.7 - 12.2 in
(XX Large) 2 – 3 y 17.3 - 20.5 in 10.2 - 13 in
3 - 4 y 18.9 - 21.3 in 10.6 - 13.8 in
4 - 5 y 22 - 24.4 in 11.4 - 14.6 in

Happy Nappy Swimsuit

Size Waist Thigh Chest HPS * Crotch
(Small) 0 – 4 m 13.4 - 16.1 in 6.7 - 8.7 in 16.1 - 18.9 in 12.6 - 13.8 in
(Medium) 3 – 8 m 14.6 - 17.3 in 7.5 - 9.4 in 18.1 - 19.7 in 15.7 – 16.9 in
(Large) 6 – 14 m 15.7 - 18.5 in 7.9 - 10.2 in 18.9 - 21.3 in 17.3 - 18.5 in
(X Large) 1 – 2 y 16.5 - 19.7 in 8.7 - 12.2 in 20.5 - 22 in 18.9 – 20 in
(XX Large) 2 – 3 y 17.3 - 20.5 in 10.2 - 13 in 21.3 – 23.6 in 20.5 – 21.7 in

*HPS = High point of shoulder

Happy Nappy Wetsuit

Size Waist Thigh Chest HPS * to Crotch
(Small) 0 – 4 m 14.2 - 16.5 in 7.1 - 9.4 in 15.7 – 17.3 in 12.6 - 13.8 in
(Medium) 3 – 8 m 15.7 – 18.1 in 7.9 - 10.2 in 17.3 – 18.9 in 13.8 – 15 in
(Large) 6 – 14 m 16.9 – 18.5 in 8.7 – 11 in 18.9 – 20.5 in 15.3 - 16.5 in
(X Large) 1 – 2 y 17.7 – 20 in 9.4 – 11.8 in 19.7 – 21.3 in 16.5 – 17.3 in

*HPS = High point of shoulder

Happy Nappy Sunsuit

Size Waist Thigh Chest HPS * to Crotch
(Small) 0 – 4 m 14.1 - 16.5 in 7 - 9.4 in 15.7 – 17.3 in 12.6 - 13.8 in
(Medium) 3 – 8 m 15.7 – 18.1 in 7.9 - 10.2 in 17.3 – 18.9 in 13.8 – 14.9 in
(Large) 6 – 14 m 16.9 – 18.5 in 8.6 – 11 in 18.9 – 20.5 in 15.3 - 16.5 in
(X Large) 1 – 2 y 17.7 – 20.1 in 9.4 – 11.8 in 19.7 – 21.3 in 16.5 – 17.3 in

*HPS = High point of shoulder

Toddler Jammers

Size Waist Thigh Length
(Small) 2 - 3 y 17.3 - 20.5 in 9.4 - 11.8 in 9.8 in
(Medium) 3 – 4 y 18.1 – 21.3 in 10.2– 12.6 in 10.2 in

Baby Wetsuits

Baby Wrap Wetsuit

Size Chest HPS* to Crotch
(Small) 0 – 6 m 16.5 - 17.3 in 13.8 - 15.4 in
(Medium) 6 - 18 m 17.3 - 20 in 15.7 - 17.3 in
(Large) 18 – 30 m 20 – 22.8 in 16.5 – 18.1 in

Warm In One Wetsuit

Size Chest HPS* to crotch Length
(Small) 0 - 3 m 19.7 - 21.3 in 11.8 - 13 in 18.9 in
(Medium) 3 - 6 m 20.4 - 22 in 13 - 14.2 in 20 in
(Large) 6 - 12 m 22 – 23.6in 14.6 – 15.3 in 21.3 in
(Extra Large) 12 - 24 m 23.6 – 25.2 in 15.7 – 16.9 in 23.6 in

*HPS = High point of shoulder

Pool & Changing

After Swim Waterproof Onesie

Size Chest HPS * to Crotch
(Small) 6 – 12 m 22.4 in 16.1 in
(Medium) 1 – 2 y 25.2 in 18.1 in
(Large) 2 – 3 y 28 in 20 in

*HPS = High point of shoulder

Changing Mat

Size Dimensions
One Size 16.3 - 27.2 in

Nappy Wrap

Size Age
Small 0 - 4 m
Medium 3 - 14 m
Large Toddler +

Silver Lining Under Nappy

Size Waist Thigh Length
(Small) 0 – 6 m 16.5 in 6.7 - 11 in 7.5 in
(Medium) 6 – 24 m 17.3 in 8.7 - 13.4 in 7.9 in
(Large) 2 – 3 y 19.7 in 10.2 - 14.2 in 8.3 in
3T 20.5 in 10.6 - 14.1 in 9.6 in
4T 23.2 in 11.4 - 14.6 in 10.4 in

Thermaswim Baby Suit

Size Chest Body
(Small) 3 - 6 m 15.8 - 17.3 in 21.7 in
(Medium) 6 – 12 m 17.3 - 18.9 in 24 in
(Large) 12 - 24 m 18.9 - 19.6 in 26.3 in

Thermaswim Toddler Suit

Size Chest Body
2 - 4 y 19.6 - 20.5 in 23.6 in
4 - 6 y 20.5 - 21.2 in 25.2 in

Floatsuits

Floatsuit

Size Chest Length Weight
(Small) 1 - 2 y 20 in 15.7 in 25 - 33 lbs
(Medium) 2 - 4 y 22 in 16.1 in 33 - 49 lbs
(Large) 4 - 6 y 23.6 in 16.9 in 49 - 66 lbs

Sleeved Floatsuit

Size Chest Length Weight
(Small) 1 - 2 y 20 in 15.7 in 25 - 33 lbs
(Medium) 2 - 4 y 22 in 16.1 in 33 - 49 lbs
(Large) 4 - 6 y 23.6 in 17 in 49 - 66 lbs

Float Jackets

Go Splash Swim Vest

Size Chest Weight
(Small) 1 - 2 y 20 in 25 - 33 lbs
(Medium) 2 - 4 y 22 in 33 - 49 lbs
(Large) 4 - 6 y 23.6 in 49 - 66 lbs

Adjustable Swim Vest

Age Chest Weight
Age 6 - 10 Years 24.4 - 29 in 66 - 132 lbs

Go Splash Float Jacket 8- Piece

Size Chest Weight
(Small) 1 - 3 y 21.3 in 24 - 42 lbs
(Medium) 3 - 6 y 23.6 in 42 - 66 lbs

Boys Swimwear

Short Sleeved Rash Tops

Size Chest Length
1 - 2 y 21.3 – 22.8 in 14.6 in
2 - 3 y 22.8 – 24.4 in 16.1 in
3 - 4 y 25.2 – 26.8 in 17.7 in

Long Sleeved Rash Tops

Size Chest Length
1 year 18.9 – 20.9 in 13.4 in
2 years 20.9 – 22.8 in 15 in
4 years 21.7 – 23.6 in 15.7 in
6 years 23.2 - 25.2 in 17.7 in

Girls Swimwear

Essential / Jungle Swimming Costume

Size Chest Length
6 - 12 m 15.7 in 16.1 in
1 - 2 y 16.9 in 16.9 in
2 - 3 y 17.3 in 17.7 in
3 - 4 y 18.9 in 18.1 in
4 - 5 y 18.9 in 19.7 in
6 - 7 y 20.5 in 20.9 in
8 - 9 y 21.3 in 22.8 in
10 - 11 y 22 in 24.4 in
12 - 13 y 24.4 in 25.6 in

Short Sleeved Rash Tops

Size Chest Length
1 - 2 y 21.3 – 22.8 in 14.6 in
2 - 3 y 22.8 – 24.4 in 16.1 in
3 - 4 y 25.2 – 26.8 in 17.7 in

Long Sleeved Rash Tops

Size Chest Length
1 year 18.9 – 20.9 in 13.4 in
2 years 20.9 – 22.8 in 14.9 in
4 years 21.7 – 23.6 in 15.7 in
6 years 23.2 - 25.2 in 17.7 in

Wetsuits & Sunsuits

UV Sun and Sea Wetsuit

Size Chest HPS* to Crotch Length
1 - 2 y 19.7 – 21.3 in 15.7 – 16.5 in 23.6 in
2 - 4 y 21.3 – 22 in 16.5 – 17.3 in 24 in
4 - 6 y 22 – 23.6 in 17.3 – 18.1 in 24.4 in

*HPS = High point of shoulder

Beach Accessories

Older Children & Adults

Jammers

Toddler Jammers

Size Waist Thigh Length
(Small) 2 - 3 y 17.3 - 20.5in 9.4 – 11.8 in 9.8 in
(Medium) 3 - 4 y 18.1 – 21.3 in 10.2 – 12.6 in 10.2 in

Child Jammers

Size Waist Thigh Length
(Small) 4 - 5 y 18.9 – 22in 11 – 13.3 in 9.8 in
(Medium) 5 - 6 y 19.7 – 22.8 in 11.8 – 14.1 in 10.6 in
(Large) 6 - 7 y 20.5 – 23.6 in 12.6 – 15 in 11.8 in
(Extra Large) 7 - 8 y 21.3 – 24.4 in 13.4 – 15.7 in 12.6 in

Adult Jammers

Size Waist Thigh Length
Extra Small 22 – 26.8 in 13.8 – 16.9 in 15 in
Small 24.4 – 27.6 in 15.7 – 18.5 in 15.7 in
Medium 26.8 - 30.7 in 16.9 – 20 in 16.5 in
Large 30 – 81.5 in 18.5 – 21.6 in 17.3 in
Extra Large 34.6 – 40.9 in 19.7 – 23.6 in 18.1 in

Splash Shorts

Adult Splash Shorts

Size Waist Thigh
Small 10.2- 33.9 in 19.7- 23.6 in
Medium 29.1- 37 in 21.3- 25.2 in
Large 31.5 - 39.4 in 23.6 - 27.6 in
Extra Large 35.4 - 45.7 in 25.2 - 29.1 in

Splash Costume

Adult Splash Costume with Skirt

Size Chest Thigh
Small 26.8 - 30.7 in 14.9 – 18.9 in
Medium 29.9 – 35.4 in 15.7 – 20.5 in
Large 33.8 – 39.3 in 18.9 – 23.6 in
X Large 37 – 41.7 in 21.2 – 26.7 in

Thermaswim Adult Swim Top

Size Chest
XS/S 33.8 - 37 in
M/L 38 - 39.8 in
L/XL 41-44.1 in
XXL 44.9+ in

Thermaswim Adult Swim Shorts

Size Waist
XS/S 26.9 - 28.5 in
M/L 29 - 33.9 in
L/XL 34.6-38.9 in
XXL 39.7+ in

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