Speedo Global Fit Adult Female Swim 30-46

This size guide covers Speedo Global Fit adult women's swimwear in numeric sizes 30–46 (equivalent to UK dress sizes 6–22). The Global Fit range is designed to accommodate a wider range of international body shapes. All measurements are body measurements taken from your own body, not garment measurements. Always use your bust measurement as the primary guide. International size equivalents (D, F, I, Lat Am, Aus, USA) can be expanded within the sizing table below.

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Body Measurement Points

Speedo women's swimwear body measurement diagram

How to Measure

Take all measurements directly against your skin using a soft tape measure. All measurements are body measurements, not garment measurements.

A
BustMeasure around the fullest part of your chest, keeping the tape horizontal and snug but not tight.
B
WaistMeasure at the narrowest part of your natural waist.
C
HipMeasure around the fullest part of your hips and seat, keeping the tape horizontal.

*Waist is measured at the natural waist at narrowest point.

Sizing Table — Speedo Global Fit Adult Female Swimwear (Sizes 30–46)

Sizing	30/6	32/8	34/10	36/12	38/14	40/16	42/18	44/20	46/22
International Size Equivalents
UK Dress Size	6	8	10	12	14	16	18	20	22
D (Germany)	34	36	38	40	42	44	46	48	50
F (France)	36	38	40	42	44	46	48	50	52
I (Italy)	40	42	44	46	48	50	52	54	56
Lat Am	30	32	34	36	38	40	42	44	46
Aus	6	8	10	12	14	16	18	20	22
USA	2	4	6	8	10	12	14	16	18
Body Measurements (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
Hip	86–90	91–94	95–99	100–105	106–110	111–115	116–120	121–125	126–131
Body Measurements (inches)
Bust	31–32½	33–34	34½–36	36½–38½	39–40½	41–42½	43–44½	45–46½	47–48½
Waist*	24–25½	26–27	27½–29	29½–31½	32–33½	34–35½	36–37½	38–39½	40–41½
Hip	34–35½	36–37	37½–39	39½–41½	42–43½	44–45½	46–47½	48–49½	50–51½

*Waist is natural waist at narrowest point. All measurements are body measurements, not garment measurements.

Fit Notes

Always use your bust measurement as the primary guide when selecting a Speedo swimsuit size.
Speedo swimsuits are designed to fit closely and securely — they feel firmer than a regular fitted top, which ensures the suit stays in place during swimming.
If bust and hip measurements suggest different sizes, choose the size that fits your bust and check the hip falls within range.
Speedo swimsuits are made from chlorine-resistant fabrics that ease slightly with wear — do not size up based on initial tightness.
The swimsuit should feel secure across the bust and back with no gaping, pulling, or riding up.
Rinse in cold fresh water immediately after every use. Do not tumble dry, iron, or dry-clean.
Unsure? Contact our team or call +44 1827 330600.

Frequently Asked Questions — Speedo Global Fit Women's Swimwear (30–46)

Speedo Global Fit swimwear is designed for a broader range of international body shapes, with slightly more generous proportions in the torso and hip area. If you have previously found standard Speedo suits too narrow or restrictive, the Global Fit range may be a better fit.

Measure your bust, waist, and hip against your skin with a soft tape measure. Use your bust as the primary guide and compare to the sizing table above. International size equivalents are in the collapsible section — always prioritise body measurements.

Size to your bust measurement. Speak to a member of staff at Allens if you are unsure.

Speedo swimsuits are primarily designed for pool use. While the chlorine-resistant fabrics will withstand occasional use in open water or the sea, prolonged exposure to salt water can accelerate fabric degradation. Rinse the suit thoroughly in fresh water after every use. For dedicated open water or triathlon use, a wetsuit or open water-specific suit is recommended.

Rinse your Speedo swimsuit in cold fresh water immediately after every use to remove chlorine, salt, and sunscreen. Hand wash gently with a mild detergent if needed. Do not machine wash, tumble dry, iron, or dry-clean. Store flat and dry, away from direct sunlight.

Speedo swimsuit sizes do not directly correspond to standard clothing sizes. Always use body measurements to select the correct size. International size equivalents are shown as a secondary reference only — always prioritise body measurements.

Standard Speedo swimsuits are suitable for recreational and fitness swimming. For competitive pool swimming, Speedo's Fastskin racing range is specifically designed and World Aquatics approved. Speak to a member of staff at Allens for guidance on the right product for your level.