size guide

Size Guide

Torso measurement is the most important for finding your accurate one piece size.
If you are between torso measurements or your torso runs long, we recommend sizing up!
Excludes Caroline One Piece Swimsuit.

Size	AU Dress Size	Torso (CM)	Cup Size	Waist (CM)	Hip (CM)	Bust (CM)
Youth
18	5–6 Years	102–109	—	48–53	56–64	56–58
20	7–8 Years	112–119	—	56–61	66–74	61–66
22 / 22J	9–10 Years	122–130	—	58–61	76–81	69–71
24J	11–12 Years	135	—	61–64	84–86	74–76
Adult
24	4	142	AA	58–61	84–86	74–76
26	4 \| 6	145	A	64–66	89–91	79–81
28	6 \| 8	149	B	69–71	94–97	84–86
30	8 \| 10	152	C	74–76	99–102	89–91
32	10 \| 12	156	C	79–81	104–107	94–97
34	12 \| 14	160	C \| D	84–86	109–112	99–102
36	14 \| 16	164		89–91	114–117	104–107
38	16 \| 18	168		94–97	119–122	109–112
40	18 \| 20	172		99–102	125–127	114–117
42	20 \| 22	175		104–107	130–132	119–122
44	22 \| 24	179		109–112	135–137	125–127

Caroline One Piece Swimsuit

Size	AU Dress Size	Torso (CM)	Cup Size	Waist (CM)	Hip (CM)	Bust (CM)
26	4	145	AA	64–66	89–92	79–81
28	4 \| 6	149	A	69–71	94–97	84–86
30	6 \| 8	153	B	74–76	99–102	89–92
32	8 \| 10	156	B \| C	79–81	104–107	94–97
34	10 \| 12	160	C	84–86	109–112	99–102
36	12 \| 14	164	C	89–92	114–117	104–107
38	14 \| 16	168	C \| D	94–97	119–122	109–112
40	16 \| 18	172	D \| DD	99–102	125–127	115–117
42	18 \| 20	175		104–107	130–132	119–122
44	20 \| 22	179		109–112	135–137	125–127

To find your bust measurement - measure the circumference of the fullest part of your chest.

Wait, what's the difference?

Train Bikini Tops are made with super compressive, chlorine-resistant fabric designed for regular training, durability, and high-performance swimming.

Surf Bikini Tops use a more flexible fabric that still holds everything in place, with a less compressive fit for recreational swimming and laid-back water activities.

Train Bikini Tops

Size	Bust (CM)	Under Bust (CM)	Cup Size	Waist (CM)
XXS	69–74	66–69	AA	59–61
XS	79–81	71–74	A	64–66
S	84–86	76–79	A	69–71
M	89–92	81–84	B	74–76
L	94–97	86–89	C	79–81
XL	99–102	92–94	C/D	84–86
2XL/D	97–99	89–92	D/DD	89–92
4XL/DD	97–99	89–92	DDD	94–97

Surf Bikini Tops

Size	AU Dress Size	Bust (CM)	Cup Size	Under Bust (CM)	Waist (CM)
XS	6 \| 8	79–81	A	69–71	64–66
S	8 \| 10	84–86	A/B	74–76	69–71
M	10 \| 12	89–91	B/C	79–81	74–76
L	12 \| 14	94–97	C	84–86	79–84
XL	14 \| 16	99–102	C/D	89–94	86–89
1X	18 \| 20	107–114	D/DD	99–104	94–102
2X	20 \| 22	117–122	D/DD	107–109	104–109
3X	24 \| 26	124–130	DD/E	117–122	112–117
4X	28 \| 30	132–137	DD/E	124–130	119–125

Wait, what's the difference?

Train Bikini Bottoms are made with super compressive, chlorine-resistant fabric designed for regular training, durability, and high-performance swimming.

Surf Bikini Bottoms use a more flexible fabric that still holds everything in place, with a less compressive fit for recreational swimming and laid-back water activities.

Train Bikini Bottoms

Size	Waist (CM)	Hip (CM)
XXS	59–61	76–82
XS	64–66	89–92
S	69–71	94–97
M	74–76	99–102
L	79–81	104–107
XL	84–86	109–112

Surf Bikini Bottoms

Size	AU Dress Size	Waist (CM)	Hip (CM)
XS	6 \| 8	64–66	89–91
S	8 \| 10	69–71	94–97
M	10 \| 12	74–76	99–102
L	12 \| 14	79–84	104–107
XL	14 \| 16	86–89	109–114
1X	18 \| 20	94–102	119–127
2X	20 \| 22	104–109	130–135
3X	24 \| 26	112–117	137–142
4X	28 \| 30	119–124	145–155

Hip measurement is the most important measurement for finding your accurate swim brief size.

Train Swim Briefs

Size	Waist (CM)	Hip (CM)
22	51–56	59–61
24	59–64	64–69
26	64–71	69–79
28	71–76	81–84
30	76–81	86–89
32	81–86	92–94
34	86–92	97–99
36	92–97	102–104
38	97–102	106–109

Women's One Piece Swimsuit

Size	AU Dress Size	Torso (CM)	Cup Size	Waist (CM)	Hip (CM)	Bust (CM)
Youth
18	5–6 Years	102–109	—	48–53	56–64	56–58
20	7–8 Years	112–119	—	56–61	66–74	61–66
22 / 22J	9–10 Years	122–130	—	58–61	76–81	69–71
24J	11–12 Years	135	—	61–64	84–86	74–76
Adult
24	4	142	AA	58–61	84–86	74–76
26	4 \| 6	145	A	64–66	89–91	79–81
28	6 \| 8	149	B	69–71	94–97	84–86
30	8 \| 10	152	C	74–76	99–102	89–91
32	10 \| 12	156	C	79–81	104–107	94–97
34	12 \| 14	160	C \| D	84–86	109–112	99–102
36	14 \| 16	164		89–91	114–117	104–107
38	16 \| 18	168		94–97	119–122	109–112
40	18 \| 20	172		99–102	125–127	114–117
42	20 \| 22	175		104–107	130–132	119–122
44	22 \| 24	179		109–112	135–137	125–127

Caroline One Piece Swimsuit

Size	AU Dress Size	Torso (CM)	Cup Size	Waist (CM)	Hip (CM)	Bust (CM)
26	4	145	AA	64–66	89–92	79–81
28	4 \| 6	149	A	69–71	94–97	84–86
30	6 \| 8	153	B	74–76	99–102	89–92
32	8 \| 10	156	B \| C	79–81	104–107	94–97
34	10 \| 12	160	C	84–86	109–112	99–102
36	12 \| 14	164	C	89–92	114–117	104–107
38	14 \| 16	168	C \| D	94–97	119–122	109–112
40	16 \| 18	172	D \| DD	99–102	125–127	115–117
42	18 \| 20	175		104–107	130–132	119–122
44	20 \| 22	179		109–112	135–137	125–127

Women's Bikini Top

To find your bust measurement - measure the circumference of the fullest part of your chest.

Wait, what's the difference?

Train Bikini Tops are made with super compressive, chlorine-resistant fabric designed for regular training, durability, and high-performance swimming.

Surf Bikini Tops use a more flexible fabric that still holds everything in place, with a less compressive fit for recreational swimming and laid-back water activities.

Train Bikini Tops

Size	Bust (CM)	Under Bust (CM)	Cup Size	Waist (CM)
XXS	69–74	66–69	AA	59–61
XS	79–81	71–74	A	64–66
S	84–86	76–79	A	69–71
M	89–92	81–84	B	74–76
L	94–97	86–89	C	79–81
XL	99–102	92–94	C/D	84–86
2XL/D	97–99	89–92	D/DD	89–92
4XL/DD	97–99	89–92	DDD	94–97

Surf Bikini Tops

Size	AU Dress Size	Bust (CM)	Cup Size	Under Bust (CM)	Waist (CM)
XS	6 \| 8	79–81	A	69–71	64–66
S	8 \| 10	84–86	A/B	74–76	69–71
M	10 \| 12	89–91	B/C	79–81	74–76
L	12 \| 14	94–97	C	84–86	79–84
XL	14 \| 16	99–102	C/D	89–94	86–89
1X	18 \| 20	107–114	D/DD	99–104	94–102
2X	20 \| 22	117–122	D/DD	107–109	104–109
3X	24 \| 26	124–130	DD/E	117–122	112–117
4X	28 \| 30	132–137	DD/E	124–130	119–125

Women's Bikini Bottom

Wait, what's the difference?

Train Bikini Bottoms are made with super compressive, chlorine-resistant fabric designed for regular training, durability, and high-performance swimming.

Surf Bikini Bottoms use a more flexible fabric that still holds everything in place, with a less compressive fit for recreational swimming and laid-back water activities.

Train Bikini Bottoms

Size	Waist (CM)	Hip (CM)
XXS	59–61	76–82
XS	64–66	89–92
S	69–71	94–97
M	74–76	99–102
L	79–81	104–107
XL	84–86	109–112

Surf Bikini Bottoms

Size	AU Dress Size	Waist (CM)	Hip (CM)
XS	6 \| 8	64–66	89–91
S	8 \| 10	69–71	94–97
M	10 \| 12	74–76	99–102
L	12 \| 14	79–84	104–107
XL	14 \| 16	86–89	109–114
1X	18 \| 20	94–102	119–127
2X	20 \| 22	104–109	130–135
3X	24 \| 26	112–117	137–142
4X	28 \| 30	119–124	145–155

Men's Brief

Hip measurement is the most important measurement for finding your accurate swim brief size.

Train Swim Briefs

Size	Waist (CM)	Hip (CM)
22	51–56	59–61
24	59–64	64–69
26	64–71	69–79
28	71–76	81–84
30	76–81	86–89
32	81–86	92–94
34	86–92	97–99
36	92–97	102–104
38	97–102	106–109

How to Measure

Torso The most important measurement for finding your accurate one piece size.

Measure from the top of your shoulder over the fullest part of your bust, through your legs and around, up your back to the starting point. If you are in between torso measurements or know your torso runs long, we recommend sizing up!

Bust

Measure around the fullest part of the bust.

Waist

Measure around the smallest part of the waist.

Hips

Keep the measuring tape parallel to the floor and measure around the fullest part of the hips.

Women's swimsuit measurement guide showing torso, bust, waist and hip measurements

Thigh

Wrap a measuring tape around the widest part of your thigh, ensuring it is snug but not too tight.

Inseam

Stand straight and measure from the highest point of your inner thigh down towards your knee.

Fabric Tips

Foreverever®

Consider Sizing Up

Classic chlorine-resistant fabric. Least stretch, most structured — size up if you're between sizes.

Sea-Flex

Size Guide

Caroline One Piece Swimsuit

Train Bikini Tops

Surf Bikini Tops

Train Bikini Bottoms

Surf Bikini Bottoms

Train Swim Briefs

Caroline One Piece Swimsuit

Train Bikini Tops

Surf Bikini Tops

Train Bikini Bottoms

Surf Bikini Bottoms

Train Swim Briefs

True to Size

Performance fabric with the feel of lifestyle swimwear. A bit more stretch than Foreverever.