Nike Womens Swimwear Size Guide

This size guide covers Nike Women's Performance Swimwear. Nike's HydraStrong swimsuits deliver long-lasting durability and chlorine resistance for frequent training, featuring secure linings and chaff-reducing flat seams across a range of performance cuts including racerback, fastback, and cutout styles.

Made with heavy-duty polyester and PBT blends designed to resist chlorine, sun fade, and stretching over time. Fully lined interiors and flatlock seams minimise skin irritation and chafing during extended swim sessions. Narrow or wide strap configurations offer medium to high support depending on the chosen style.

Select your size using your bust (A), waist (B), hips (C), and torso (D) measurements. If your hip and waist measurements suggest different sizes, use the hip measurement.

Shop Nike Women's Swimwear →

Body Measurement Points

How to Measure

Take all measurements directly against your skin using a soft tape measure. Use your hip measurement (C) as the primary guide — if your hips and waist correspond to different sizes, use the size indicated by your hip measurement.

A
BustMeasure around the fullest part of your bust, across the bust points, keeping the tape horizontal.
B
WaistMeasure around the narrowest part of your waist — typically the small of your back and where your body bends side to side.
C
HipsMeasure around the fullest part of your hips, keeping the tape horizontal.
D
TorsoMeasure from the midpoint of your shoulder, over the fullest part of your bust, through your legs, and up your back to the starting point.

If you are between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. Speak to a member of staff at Allens if you are unsure.

Sizing Table — Nike Women's Performance Swimwear

Sizes 20 – 30

Size	20	22	24	26	28	30
Body Measurements (cm)
A — Bust	65–68.75	68.75–72.5	72.5–77.5	77.5–82.5	82.5–87.5	87.5–92.5
B — Waist	49.5–53	53.5–57	58–61	61–65	65–68.5	68.5–72.5
C — Hips	71–75.5	75.5–80	80–84.5	84.5–89	89–93.5	93.5–98
D — Torso	126.5–133.5	133.5–140.5	140.5–145	145–149	149–153.5	153.5–158
Body Measurements (inches)
A — Bust	25.5–27	27–28.5	28.5–30.5	30.5–32.5	32.5–34.5	34.5–36.5
B — Waist	19.5–21	22–22.5	22.75–24	24–25.5	25.5–27	27–28.5
C — Hips	28–29.75	29.75–31.5	31.5–33.25	33.25–35	35–36.75	36.75–38.5
D — Torso	49.75–52.5	52.5–55.25	55.25–57	57–58.75	58.75–60.5	60.5–62.25

Sizes 32 – 42

Size	32	34	36	38	40	42
Body Measurements (cm)
A — Bust	92.5–98	98–103	103–108	108–113	113–118	118–123
B — Waist	72.5–76	76–80	80–84	84–87.5	87.5–91.5	91.5–95.5
C — Hips	98–101.5	101.5–105.5	105.5–109	109–113	113–117	117–120.5
D — Torso	158–162.5	162.5–167	167–171.5	171.5–176	176–180.5	180.5–185
Body Measurements (inches)
A — Bust	36.5–38.5	38.5–40.5	40.5–42.5	42.5–44.5	44.5–46.5	46.5–48.5
B — Waist	28.5–30	30–31.5	31.5–33	33–34.5	34.5–36	36–37.5
C — Hips	38.5–40	40–41.5	41.5–43	43–44.5	44.5–46	46–47.5
D — Torso	62.25–64	64–65.75	65.75–67.5	67.5–69.25	69.25–71	71–72.75

All measurements are body measurements, not garment measurements. If between sizes, order the smaller size for a tighter fit or the larger size for a looser fit. If hips and waist suggest different sizes, use the hip measurement. Speak to a member of staff at Allens if you are unsure.

Fit Notes — Nike Women's Performance Swimwear

Use your hip measurement (C) as the primary guide — if your hips and waist correspond to different sizes, order the size indicated by your hip measurement.
If you are between two sizes, order the smaller size for a tighter, more performance-oriented fit, or the larger size for a more comfortable, relaxed fit.
The torso measurement (D) is particularly important for one-piece swimsuits — it ensures the suit sits correctly across the shoulders without pulling or gaping at the straps.
Nike's HydraStrong fabric is made with heavy-duty polyester and PBT blends that resist chlorine, sun fade, and loss of stretch over time — ideal for regular pool training.
The suit is fully lined with flatlock seams — it should lie completely smooth against the skin with no bunching or irritation during extended swim sessions.
Support varies by style — narrow strap styles offer medium support while wide strap configurations provide higher support. Choose based on your training needs and personal preference.
Rinse in cold fresh water after every use. Avoid machine washing with heavy items, tumble drying, ironing, or dry-cleaning. Dry flat away from direct sunlight.
Unsure? Contact our team or call +44 1827 330600. Speak to a member of staff at Allens if you are unsure.

Frequently Asked Questions — Nike Women's Performance Swimwear

Measure your bust (A), waist (B), hips (C), and torso (D) using a soft tape measure taken directly against your skin. Use your hip measurement as the primary guide and compare to the sizing table above. If your hips and waist correspond to different sizes, order the size indicated by your hip measurement. Speak to a member of staff at Allens if you are unsure.

If you are between two sizes, order the smaller size for a tighter, more performance-oriented fit, or the larger size for a more comfortable, relaxed fit. This is Nike's official guidance — the best choice depends on your personal preference and the type of training you are doing. Speak to a member of staff at Allens if you need further advice.

Start at the midpoint of your shoulder — halfway between the base of your neck and your shoulder joint. Run the tape measure over the fullest part of your bust, down through your legs, and back up your spine to the starting point. This measurement ensures the swimsuit sits correctly across the shoulders and through the body without pulling or gaping.

Nike performance swimwear is designed for a close, streamlined fit suited to active swimming. The sizing table above uses body measurements, so comparing your actual measurements to the table will give the most accurate result. If you prefer more coverage or a less compressive feel, consider ordering one size up. Speak to a member of staff at Allens if you are unsure.

Nike HydraStrong is a heavy-duty performance fabric made from polyester and PBT blends specifically engineered for swimmers who train frequently in chlorinated pools. It resists chlorine degradation, sun fading, and loss of stretch over time — meaning the suit retains its shape and coverage session after session. HydraStrong suits are significantly more durable than standard fashion swimwear.

Nike offers several performance cuts to suit different training styles. Racerback suits provide a full range of arm motion ideal for freestyle and butterfly. Fastback suits offer a wider back panel for additional coverage and support. Cutout styles balance performance with style. If you prioritise maximum shoulder mobility, choose a racerback or fastback. Speak to a member of staff at Allens for guidance on which cut best suits your training.

Rinse the suit in cold fresh water immediately after every use to remove chlorine and salt. Machine wash on a gentle cycle if needed — avoid washing with heavy items such as towels or jeans which can damage the fabric. Do not tumble dry, iron, or dry-clean. Dry flat away from direct sunlight to preserve the fabric's stretch, shape, and colour over time.

Nike's HydraStrong performance swimsuits are primarily designed for pool training. The chlorine-resistant fabric and secure lining make them excellent for frequent pool use. They can be worn in open water, though a wetsuit is typically recommended for cold water open water swimming. For more advice on the right swimwear for your training, speak to a member of staff at Allens.