Size Guide — Coastal Bloom Swimwear

Our Sizing

Size Guide & Fit Philosophy

At Coastal Bloom, we believe that the right fit transforms how you feel in and out of the water. Our sizing is designed for real bodies — inclusive, thoughtful, and crafted with movement in mind. We recommend measuring yourself and using our charts below for the best results.

Bikini Tops
Size	AU/US Size	Bust (cm)	Underbust (cm)	Cup
XS	6–8	76–82	64–68	A–B
S	8–10	82–88	68–72	B–C
M	10–12	88–94	72–76	C–D
L	12–14	94–100	76–82	D–DD
XL	14–16	100–108	82–88	DD–E
XS	6–8	30–32	25–27	A–B
S	8–10	32–35	27–28	B–C
M	10–12	35–37	28–30	C–D
L	12–14	37–39	30–32	D–DD
XL	14–16	39–43	32–35	DD–E

Bikini Bottoms
Size	AU/US Size	Waist (cm)	Hips (cm)	Rise
XS	6–8	60–64	84–88	Low–Mid
S	8–10	64–68	88–92	Low–Mid
M	10–12	68–74	92–98	Mid
L	12–14	74–80	98–104	Mid–High
XL	14–16	80–88	104–112	High
XS	6–8	24–25	33–35	Low–Mid
S	8–10	25–27	35–36	Low–Mid
M	10–12	27–29	36–39	Mid
L	12–14	29–32	39–41	Mid–High
XL	14–16	32–35	41–44	High

One-Pieces & Monokinis
Size	AU/US Size	Bust (cm)	Waist (cm)	Hips (cm)
XS	6–8	76–82	60–64	84–88
S	8–10	82–88	64–68	88–92
M	10–12	88–94	68–74	92–98
L	12–14	94–100	74–80	98–104
XL	14–16	100–108	80–88	104–112
XS	6–8	30–32	24–25	33–35
S	8–10	32–35	25–27	35–36
M	10–12	35–37	27–29	36–39
L	12–14	37–39	29–32	39–41
XL	14–16	39–43	32–35	41–44

Cover-Ups & Kaftans
Size	AU/US Size	Bust (cm)	Length (cm)	Fit
XS	6–8	80–88	80–85	Relaxed
S	8–10	88–96	83–88	Relaxed
M	10–12	96–104	86–91	Relaxed
L	12–14	104–114	89–94	Oversized
XL	14–16	114–124	92–97	Oversized
XS	6–8	32–35	32–34	Relaxed
S	8–10	35–38	33–35	Relaxed
M	10–12	38–41	34–36	Relaxed
L	12–14	41–45	35–37	Oversized
XL	14–16	45–49	36–38	Oversized

Measuring Guide

How to Measure Yourself

For best results, use a soft measuring tape and measure against bare skin. Stand naturally — don't hold your breath!

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Step 01

Measure Your Bust

Wrap the measuring tape around the fullest part of your chest, keeping it parallel to the floor. Ensure the tape is snug but not tight — you should be able to breathe comfortably.

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Step 02

Measure Your Waist

Measure around your natural waistline — this is the narrowest part of your torso, typically about 2cm above your belly button. Keep the tape level and relaxed.

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Step 03

Measure Your Hips

Stand with feet together and measure around the fullest part of your hips and bottom, usually about 20cm below your natural waist. Keep the tape horizontal all the way around.

Pro Tips

Sizing Tips from Our Stylists

Between Sizes?

If you fall between two sizes, we generally recommend sizing up for tops and down for bottoms. Our fabrics have excellent stretch and recovery, so they'll adapt to your body beautifully.

Fuller Busts

If you have a fuller bust (D+ cup), consider sizing up in your bikini top for extra coverage and support. Our tops feature adjustable ties for a personalised fit at every cup size.

High-Waist Styles

For our high-waist bottoms, we recommend sizing based on your hip measurement rather than your waist. The high-rise design provides gentle compression and a smooth silhouette.

Cover-Ups

Our cover-ups are intentionally cut in a relaxed, flowing silhouette. They're designed to be worn loosely over your swimwear. When in doubt, go with your standard dress size.

Find Your Perfect Fit