Girls Hyperboom Splice Muscleback Swimsuit Navy - Speedo

$10.00 USD

~~$20.99 USD~~ $10.00 USD

Sale Sold out

Color: Navy

Size: 4 4 6 8 10 12 14 16

Designed for junior training, lessons, and active swims, the Hyperboom Splice Muscleback swimsuit is part of our iconic Hyperboom collection. Made from Endurance Pro fabric for active comfort and durability, it resists chlorine and pilling while delivering flexible four-way stretch. The design includes classic coverage and muscleback straps, allowing flexibility and freedom of movement. Body made of 57% polyester, 43% polyester PBT.

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Size Chart

Men

Swimwear

Waist (Inches)	Hip (Inches)	Size
28	33.5	XXS
30	35.5	XS
32	37.5	S
34	39.5	M
36	41.5	L
38	43.5	XL
40	45.5	XXL
42	47.5	XXXL

Waist (CM)	Hip (CM)	Size
70	84.5	XXS
75	89.5	XS
80	94.5	S
85	99.5	M
90	104.5	L
95	109.5	XL
100	114.5	XXL
105	119.5	XXXL

Swim Shorts

Waist (Inches)	Hip (Inches)	Size
28	33.5	XXS
30	35.5	XS
32	37.5	S
34	39.5	M
36	41.5	L
38	43.5	XL
40	45.5	XXL
42	47.5	XXXL

Waist (CM)	Hip (CM)	Size
70	84.5	XXS
75	89.5	XS
80	94.5	S
85	99.5	M
90	104.5	L
95	109.5	XL
100	114.5	XXL
105	119.5	XXXL

Fastskin LZR Pure Intent & Pure Valor


Waist (Inches)	Hip (Inches)	Speedo Sze
24	29.5	24
26	31.5	26
28	33.5	28
30	36.5	30
32	37.5	32
34	39.5	34
36	41.5	36
38	43.5	38
40	45.5	40
42	47.5	42
44	49.5	44
46	51.5	46

Waist (CM)	Hip (CM)	Speedo Sze
60	74.5	24
65	79.5	26
70	84.5	28
75	89.5	30
80	94.5	32
85	99.5	34
90	104.5	36
95	109.5	38
100	114.5	40
105	119.5	42
110	124.5	44
115	129.5	46

Fastskin LZR Elite Openwater Suit

Waist (Inches)	Hip (Inches)	Speedo Sze
24	29.5	24
26	31.5	26
28	33.5	28
30	36.5	30
32	37.5	32
34	39.5	34
36	41.5	36
38	43.5	38
40	45.5	40
42	47.5	42
44	49.5	44
46	51.5	46

Waist (CM)	Hip (CM)	Speedo Sze
60	74.5	24
65	79.5	26
70	84.5	28
75	89.5	30
80	94.5	32
85	99.5	34
90	104.5	36
95	109.5	38
100	114.5	40
105	119.5	42
110	124.5	44
115	129.5	46

Wetsuits


Waist (Inches)	Hip (Inches)	Speedo Sze
24	29.5	24
26	31.5	26
28	33.5	28
30	36.5	30
32	37.5	32
34	39.5	34
36	41.5	36
38	43.5	38
40	45.5	40
42	47.5	42
44	49.5	44
46	51.5	46

Waist (CM)	Hip (CM)	Speedo Sze
60	74.5	24
65	79.5	26
70	84.5	28
75	89.5	30
80	94.5	32
85	99.5	34
90	104.5	36
95	109.5	38
100	114.5	40
105	119.5	42
110	124.5	44
115	129.5	46

Footwear

Foot Length (CM)	EU Size	UK Size
25-25.5	39	6
26-26.5	40.5	7
27-27.5	42	8
28-28.5	43	9
29-29.5	44.5	10
30-30.5	46	11
31-31.5	47	12
32-32.5	48	13

Pool Socks

UK	US	EUR	Size (cm)
1 - 4	2 - 5	33 - 37	21 - 23.5
5 - 7	6 - 8	38 - 40.5	24 - 26.5
8 - 10	9 - 11	42 - 44.5	27 - 29.5
11 - 12	12 - 13	46 - 47	30 - 31.5

Latex Socks

Speedo Size	S	M	L
UK	3-7	5-9	7-12
EU	35-40	38-42	40-45

Women

Swimwear

Speedo Size	30	32	34	36	38	40	42	44	46
UK	6	8	10	12	14	16	18	20	22
Body Measurements	cm	cm	cm	cm	cm	cm	cm	cm	cm
Bust	79-83	84-87	88-92	93-98	99-103	104-108	109-113	114-118	119-123
Waist*	61-65	66-69	70-74	75-80	81-85	86-90	91-95	96-100	101-105
Hips	86-90	91-94	95-99	100-105	106-110	111-115	116-120	121-125	126-131

Speedo Size	30	32	34	36	38	40	42	44	46
UK	6	8	10	12	14	16	18	20	22
ES	34	36	38	40	42	44	46	48	50
IT	40	42	44	46	48	50	52	54	56
DE	34	36	38	40	42	44	46	48	50
FR	36	38	40	42	44	46	48	50	52

Fastskin LZR Pure Intent & Pure Valor

SIZE	18	20	22	23	24	25	26	28	30
A-Body Loop CM	136.0-142.0	142.0-148.0	148.0-153.0	151.0-156.0	154.0-158.0	157.0-162.0	160.0-165.5	165.5-171.0	171.0-177.0
A-Body loop inches	54.0-56.0	56.0-58.0	58.0-60.0	59.5-61.5	60.5-62.0	61.5-63.5	63.0-65.0	65.0-67.5	67.5-69.5
C-Chest CM	72.0-78.0	78.0-84.0	84.0-87.0	87.0-90.0	90.0-93.0	93.0-96.0	96.0-101.0	101.0-105.0	105.0-111.0
C-Chest Inches	28.0-30.5	30.5-33.0	33.0-34.0	34.0-35.5	35.5-36.5	36.5-37.5	37.5-40.0	40.0-41.5	41.5-43.5
D- Waist CM’s	57.0-61.5	61.5-66.0	66.0-69.0	69.0-71.5	71.5-74.0	74.0-76.5	76.5-80.0	80.0-84.0	84.0-89.0
D-Waist Inches	22.0-24.0	24.0-26.0	26.0-27.0	27.0-28.0	28.0-29.0	29.0-30.0	30.0-31.0	32.0-33.0	33.0-35.0
B- Hip CM’s	75.0-81.0	81.0-87.0	87.0-90.0	90.0-93.0	93.0-96.0	96.0-99.0	99.0-103.5	103.5-108.0	108.0-114.0
B-Hip Inches	30.0-32.0	32.0-34.0	34.0-35.5	35.5-36.5	36.5-37.5	37.5-39.0	39.0-40.5	40.5-42.5	42.5-45.0

Wetsuits

Height (Inches)	Chest (Inches)	Waist (Inches)	Hips (Inches)	Speedo Size
4'9-5'0"	30-33	22.5-25.5	31.5-34.5	XXS
4'10-5'2"	31-34	24-27	33-36	XS
5'1-5'5"	32.5-35.5	25-28	34.5-37.5	S
5'4-5'8"	32.5-35.5	25-28	34.5-37.5	S (Tall)
5'3.5-5'7.5"	34-37	26.5-29.5	35.5-38.5	M
5'6-5'10"	25.5-38.6	28.5-31.5	36.5-39.5	L
5'9-6'1"	37.5-40.5	30-33	38.5-41.5	XL

Speedo Women's Wetsuits Size Guide
Height (CM)	Chest (CM)	Waist (CM)	Hips (CM)	Speedo Size
145-152	76-83	57-65	80-88	XXS
147-157	79-87	61-68	84-91	XS
155-165	82-90	64-72	87-95	S
163-173	82-90	64-72	87-95	S (Tall)
161-171	86-94	67-75	90-98	M
168-178	90-98	72-80	93-100	L
175-185	95-103	77-84	97-105	XL

Maternity Swimwear

Speedo Women's Maternity Swimwear Size Guide
UK Dress Size (Pre-Pregnancy)	Bust (Inches)	Waist (Inches)	Hip (Inches)	Speedo Size
8	30-32	25	35	XS
10	32-34	27	37	S
12	34-36	29	39	M
14	36-38	31	41	L
16	38-40	33	43	XL
18	40-42	35	45	XXL

Speedo Women's Maternity Swimwear Size Guide
UK Dress Size (Pre-Pregnancy)	Bust (CM)	Waist (CM)	Hip (CM)	Speedo Size
8	82	64	89	XS
10	87	69	94	S
12	92	74	99	M
14	97	79	104	L
16	102	84	107	XL
18	107	89	114	XXL

Female Watershort

Speedo Size	XXS	XS	S	M	L	XL	XXL
UK	6	8	10	12	14-16	18	20-22
Body Measurements	cm	cm	cm	cm	cm	cm	cm
Bust	79-83	84-87	88-92	93-98	99-107	108-116	117-125
Waist*	61-65	66-69	70-74	75-80	81-89	90-98	99-106
Hips	86-90	91-94	95-99	100-105	106-114	115-123	124-132

Footwear

Foot Length (CM)	EU Size	UK Size
21.5	35.5	3
22.5	37	4
23.5	38	5
24.5	39	6
25.5	40.5	7
26.5	42	8
27.5	43.5	9

Pool Socks

UK	US	EUR	Size (cm)
1 - 4	2 - 5	33 - 37	21 - 23.5
5 - 7	6 - 8	38 - 40.5	24 - 26.5
8 - 10	9 - 11	42 - 44.5	27 - 29.5
11 - 12	12 - 13	46 - 47	30 - 31.5

Latex Socks

Speedo Size	S	M	L
UK	3-7	5-9	7-12
EU	35-40	38-42	40-45

Girl's

Swimwear

Approx. Age	Height (Inches)	Chest (Inches)	Waist (Inches)	Hips (Inches)	Speedo Size
4-5	41	22	21	23	22
5-6	45.5	24	22	25	24
7-8	50.5	26	23	27.5	26
9-10	55	28.5	24.5	30	28
11-12	60	30.5	25.5	33	30
13-14	64.5	33	27	35.5	32
15-16	69	36.5	29	38	34

Approx. Age	Height (CM)	Chest (CM)	Waist (CM)	Hips (CM)	Speedo Size
4-5	104	55.5	53	58	22
5-6	116	61	56	64	24
7-8	128	66.5	59	70	26
9-10	140	72	62	76	28
11-12	152	77.5	65	84	30
13-14	164	84	69	90	32
15-16	176	90.5	73	96	34

Girl's 6 Months - 6 Years Swimwear

Approx. Age	Height (Inches)	Chest (Inches)	Waist (Inches)	Hips (Inches)	Speedo Size
4-5	41	22	21	23	22
5-6	45.5	24	22	25	24
7-8	50.5	26	23	27.5	26
9-10	55	28.5	24.5	30	28
11-12	60	30.5	25.5	33	30
13-14	64.5	33	27	35.5	32
15-16	69	36.5	29	38	34

Approx. Age	Height (CM)	Chest (CM)	Waist (CM)	Hips (CM)	Speedo Size
4-5	104	55.5	53	58	22
5-6	116	61	56	64	24
7-8	128	66.5	59	70	26
9-10	140	72	62	76	28
11-12	152	77.5	65	84	30
13-14	164	84	69	90	32
15-16	176	90.5	73	96	34

Height (Inches)	Chest (Inches)	Speedo Size
29-31	20.5	6-9 Months
31-33	21	9-12 Months
36	22	2 Years
39	23	3 Years
43	23.5	4 Years
45	24.5	5 Years
47	25	6 Years

Height (CM)	Chest (CM)	Speedo Size
74-80	52	6-9 Months
80-84	54	9-12 Months
92	56	2 Years
100	58	3 Years
110	60	4 Years
115	62	5 Years
120	64	6 Years

Infant Float Vest

Chest	Mass	Speedo Size
51cm	0-15kg	1 - 2 YRS
56cm	15 - 20kg	2 - 4 YRS
61cm	20 - 30kg	4 - 6 YRS

Fastskin Endurance+ Junior Racing Suit

Approx. Age	Chest (Inches)	Waist (Inches)	Hips (Inches)	Height (Inches)	Speedo Size
4 Years	22	21	23	41	22
6 Years	24	22	25	45.5	24
8 Years	26	23	27.5	50.5	26
10 Years	28.5	24.5	30	55	28
12 Years	30.5	25.5	33	60	30
14 Years	33	27	35.5	64.5	32
16 Years	36.5	29	38	69	34

Girl's Float Suit

Chest	Mass	Speedo Size
55cm	15-18kg	2-3 YRS
57cm	18-22kg	3-4 YRS
59cm	22-26kg	4-5 YRS
61cm	26-30kg	5-6 YRS

Girl's Swim (Aqua) Nappy

Height	Mass	Speedo Size
62cm	6kg	0-3 Mths
68cm	8kg	3-6 Mths
74cm	9.5kg	6-9 Mths
80cm	11kg	9-12 Mths
86cm	12kg	12-18 Mths
92cm	13kg	18-24 Mths

Boy's

Swimwear

Approx. Age	Height (Inches)	Chest (Inches)	Waist (Inches)	Hip (Inches)	Speedo Size
4-5	41	21.5	21	23.5	22
5-6	46	23.5	23	25.5	24
7-8	50	25.5	24	27.5	26
9-10	55	28	26	29.5	28
11-12	60	30.5	28	32	30
13-14	64.5	33	30	34.5	32
15-16	69	36	32	37	34

Approx. Age	Height (CM)	Chest (CM)	Waist (CM)	Hip (CM)	Speedo Size
4-5	104	54.5	53.5	60	22
5-6	116	60	58	65	24
7-8	128	65.5	61.5	70	26
9-10	140	71	66	75	28
11-12	152	78	71	81.5	30
13-14	164	84	76	88	32
15-16	176	91	81	94.5	34

Height (Inches)	Waist (Inches)	Speedo Size
29-31	19.5	6-9 Months
31-33	20.5	9-12 Months
36	21	2 Years
39	21.5	3 Years
43	22	4 Years
45	22.5	5 Years
47	23	6 Years

Height (CM)	Waist (CM)	Speedo Size
74-80	50	6-9 Months
80-84	52	9-12 Months
92	54	2 Years
100	55	3 Years
110	56	4 Years
115	57	5 Years
120	58	6 Years

Junior Boy's Swim Shorts

Approx. Age	Height (Inches)	Chest (Inches)	Waist (Inches)	Hip (Inches)	Speedo Size
4-5	41	21.5	21	23.5	22
5-6	46	23.5	23	25.5	24
7-8	50	25.5	24	27.5	26
9-10	55	28	26	29.5	28
11-12	60	30.5	28	32	30
13-14	64.5	33	30	34.5	32
15-16	69	36	32	37	34

Approx. Age	Height (CM)	Chest (CM)	Waist (CM)	Hip (CM)	Speedo Size
4-5	104	54.5	53.5	60	22
5-6	116	60	58	65	24
7-8	128	65.5	61.5	70	26
9-10	140	71	66	75	28
11-12	152	78	71	81.5	30
13-14	164	84	76	88	32
15-16	176	91	81	94.5	34

Height (Inches)	Waist (Inches)	Speedo Size
29-31	19.5	6-9 Months
31-33	20.5	9-12 Months
36	21	2 Years
39	21.5	3 Years
43	22	4 Years
45	22.5	5 Years
47	23	6 Years

Height (CM)	Waist (CM)	Speedo Size
74-80	50	6-9 Months
80-84	52	9-12 Months
92	54	2 Years
100	55	3 Years
110	56	4 Years
115	57	5 Years
120	58	6 Years

Boy's 6 Months - 6 Years Swimwear

Approx. Age	Height (Inches)	Chest (Inches)	Waist (Inches)	Hip (Inches)	Speedo Size
4-5	41	21.5	21	23.5	22
5-6	46	23.5	23	25.5	24
7-8	50	25.5	24	27.5	26
9-10	55	28	26	29.5	28
11-12	60	30.5	28	32	30
13-14	64.5	33	30	34.5	32
15-16	69	36	32	37	34

Approx. Age	Height (CM)	Chest (CM)	Waist (CM)	Hip (CM)	Speedo Size
4-5	104	54.5	53.5	60	22
5-6	116	60	58	65	24
7-8	128	65.5	61.5	70	26
9-10	140	71	66	75	28
11-12	152	78	71	81.5	30
13-14	164	84	76	88	32
15-16	176	91	81	94.5	34

Height (Inches)	Waist (Inches)	Speedo Size
29-31	19.5	6-9 Months
31-33	20.5	9-12 Months
36	21	2 Years
39	21.5	3 Years
43	22	4 Years
45	22.5	5 Years
47	23	6 Years

Height (CM)	Waist (CM)	Speedo Size
74-80	50	6-9 Months
80-84	52	9-12 Months
92	54	2 Years
100	55	3 Years
110	56	4 Years
115	57	5 Years
120	58	6 Years

Boy's Float Vest

Chest	Mass	Speedo Size
51cm	0-15kg	1-2 YRS
56cm	15-20kg	2-4 YRS
61cm	20-30kg	4-6 YRS

Boy's Float Suit

Chest	Mass	Speedo Size
55cm	15-18kg	2-3 YRS
57cm	18-22kg	3-4 YRS
59cm	22-26kg	4-5 YRS
61cm	26-30kg	5-6 YRS

Boy's Swim (Aqua) Nappy

Height	Mass	Speedo Size
62cm	6kg	0-3 Mths
68cm	8kg	3-6 Mths
74cm	9.5kg	6-9 Mths
80cm	11kg	9-12 Mths
86cm	12kg	12-18 Mths
92cm	13kg	18-24 Mths

Boy's Fastskin Endurance+ Racing Suit

	Approx. Age	Waist	Hips	Height	Speedo Size
Inch Cm	4 yrs	21" 53.5cm	23.5" 60cm	41" 104cm	22
Inch Cm	6 yrs	23" 58cm	25.5" 65cm	46" 116cm	24
Inch Cm	8 yrs	24" 61.5cm	27.5" 70cm	50" 128cm	26
Inch Cm	10 yrs	26" 66cm	29.5" 75cm	55" 140cm	28
Inch Cm	12 yrs	28" 71cm	32" 81.5cm	60" 152cm	30
Inch Cm	14 yrs	30" 76cm	34.5" 88cm	64.5" 164cm	32
Inch Cm	16 yrs	32" 81cm	37" 94.5cm	69" 176cm	34

Training Aids

Biofuse Fitness Fin

Size	UK	US	EUR
XS	12 - 1	1 - 3	31 - 33
S	2 - 4	3 - 5	34 - 37
M	5 - 7	6 - 8	38 - 41
L	8 - 10	9 - 11	42 - 45
XL	11 - 13	12 - 14	46 - 48

Training Fin

Size	UK	US	EUR
XXXS	1	12 - 1	32 - 33
XXXS	1 - 2	1 - 2	34 - 35
XS	2 - 3	3 - 4	36 - 37
S	4 - 5	5 - 6	38 - 39
M	6 - 7	7 - 8	40 - 41
L	8 - 9	9 - 10	42 - 43
XL	9.5 - 10.5	10.5 - 11.5	44 - 45

Biofuse Training Fin

UK	US	EUR
2 - 3	3 - 4	35 - 36
4 - 5	5 - 6	37 - 38
6 - 7	7 - 8	39 - 41
8 - 9	9 - 10	42 - 43
10 - 11	11 - 12	44 - 46
11 - 12	12 - 13	47 - 48

Scuba Fins

UK	US	EUR
3	4	35 - 36
4 - 5	5 - 6	37 - 38
6 - 7	7 - 8	39 - 40
8	9	41 - 42
9 - 10	10 - 11	43 - 44
11	12	45 - 46

Junior Scuba Fins

UK	US	EUR
12 - 1	13 - 2	31 - 33
1 - 3	2 - 4	33 - 36
3 - 5	4 - 6	36 - 38

Fastskin KickFin

UK	US	EUR
3 - 4	4 - 5	36 - 37
5 - 6	6 - 7	38 - 39
7 - 8	8 - 9	40 - 42
9 - 10	10 - 11	43 - 45
11 - 12	12 - 13	46 - 47

Footwear

Junior Footwear

Foot Length	European Size	UK Size
16 - 16.5cm	28	10
17 - 17.5cm	29.5	11
18 - 18.5cm	31	12
19.19.5cm	32	13
20 - 20.5cm	33	1
21 - 21.5cm	34.5	2
22 - 22.5cm	35.5	3
23 - 23.5cm	37	4
24 - 24.5cm	38	5

Infant Footwear

Foot Length	European Size	UK Size
11-11.5cm	21.5	5
12-12.5cm	23	6
13-13.5cm	24	7
14-14.5cm	25.5	8
15-15.5cm	27	9

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