Speedo Global Fit Adult Female Swim 28-46

This size guide covers Speedo adult women's swimwear in Global Fit sizes 28–46 (equivalent to UK dress sizes 4–22). 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, MEX) are included in 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 28–46)

Sizing	28	30	32	34	36	38	40	42	44	46
International Size Equivalents
UK Dress Size	4	6	8	10	12	14	16	18	20	22
D (Germany)	30	32	34	36	38	40	42	44	46	48
F (France)	32	34	36	38	40	42	44	46	48	50
I (Italy)	36	38	40	42	44	46	48	50	52	54
Lat Am	Talla 28	Talla 30	Talla 32	Talla 34	Talla 36	Talla 38	Talla 40	Talla 42	Talla 44	Talla 46
Aus	6	8	10	12	14	16	18	20	22	24
USA	0	2	4	6	8	10	12	14	16	18
CAN	0	2	4	6	8	10	12	14	16	18
MEX	0	2	4	6	8	10	12	14	16	18
Body Measurements (cm)
Bust	74–78	79–83	84–87	88–92	93–98	99–103	104–108	109–113	114–118	119–123
Waist*	56–60	61–65	66–69	70–74	75–80	81–85	86–90	91–95	96–100	101–105
Hip	81–85	86–90	91–94	95–99	100–105	106–110	111–115	116–120	121–125	126–131
Body Measurements (inches)
Bust	29½–30½	31–32½	33–34	34½–36	36½–38½	39–40½	41–42½	43–44½	45–46½	47–48½
Waist*	22½–23½	24–25½	26–27	27½–29	29½–31½	32–33½	34–35½	36–37½	38–39½	40–41½
Hip	32½–33½	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 (28–46)

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 also shown in the table — always prioritise body measurements over clothing size conversions.

Size to your bust measurement. If your hips are significantly larger relative to your bust, try the next size up. Speak to a member of staff at Allens if you are unsure.

Yes — chlorine-resistant Speedo fabrics feel firm when new and ease slightly with regular use. Do not size up based on how the suit feels when you first try it on.

The Global Fit range uses a slightly different size scale to the standard Speedo numeric range. Global Fit sizes run from 28 to 46 and correspond to UK dress sizes 4–22. Always use your body measurements to find the correct size — do not assume your size based on other Speedo products you have purchased.

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.