At JJM, each piece is crafted to celebrate the body with elegance and ease. Our sizing is designed to provide support, comfort, and a flattering fit that moves effortlessly with you. Use this guide to find the size that feels most natural for your body.
How to Measure Yourself
For the most accurate fit, take your measurements in front of a mirror while wearing light clothing or underwear. Use a soft tape measure and keep it level with the floor.
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Bust
Measure around the fullest part of your bust, ensuring the tape sits straight across your back. Keep the tape snug but not tight. -
Waist
Measure around your natural waistline — the narrowest part of your torso, usually just above the navel. Relax and don’t suck in your stomach. -
Hips
Measure around the fullest part of your hips and bottom, standing with feet together. -
Torso (for one-pieces)
Start at the top of your shoulder, bring the tape down the front, between your legs, and back up to the starting point. This measurement helps ensure one-pieces fit comfortably in length.
JJM Sizing Chart
Our swimwear is crafted with precision, balancing French artistry with Australian ease. Each piece is designed to fit comfortably and flatter your natural shape.
| Size | Bust (cm) | Waist (cm) | Hips (cm) | AU/UK Size | US Size | EU Size |
|---|---|---|---|---|---|---|
| S | 82–86 | 62–66 | 88–92 | 6–8 | 2–4 | 34–36 |
| M | 87–91 | 67–71 | 93–97 | 8–10 | 4–6 | 36–38 |
| L | 92–96 | 72–76 | 98–102 | 10–12 | 6–8 | 38–40 |
| XL | 97–102 | 77–82 | 103–108 | 12–14 | 8–10 | 40–42 |
Fit Notes & Style Guidance
Bikini Tops
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If you are between sizes and prefer more coverage, size up.
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For bandeau or strapless styles, ensure a snug fit to prevent slipping.
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For triangle tops, adjustable ties allow flexibility if you fall between two sizes.
Bikini Bottoms
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For low-rise or cheeky cuts, most customers prefer their usual size.
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For fuller coverage bottoms, consider sizing up if you are between hip measurements.
One-Pieces
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Choose your size based on both torso length and bust/hip measurements.
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If you have a longer torso, we recommend sizing up for comfort.
Supportive Fit
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JJM fabrics are made with a supportive stretch to contour to the body without restricting movement.
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Over time, swimwear relaxes slightly — a firm initial fit ensures it remains supportive after wear.
Tips for Choosing Your Size
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If you are between sizes, we generally recommend sizing up for comfort — especially for one-piece styles.
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Consider how you like to wear your swimwear: more snug for swimming and sport, or slightly relaxed for lounging.
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Our designs are tested on a variety of body shapes to balance support, movement, and elegance.
JJM sizing is made to follow the rhythm of summer tides — embracing your shape with confidence, elegance, and timeless ease.
