Sports Launch April 2025 | Step One Sports Underwear

Size	AU/NZ	UK	US
XS	8A 8B 10A	30A 30B 32A	30A 30B 32A
Small	8DD 10B 10C 10D 10DD 12A 12B	30DD 32B 32C 32D 32DD 34A 34B	30DD 32B 32DD 32C 32D 34A 34B
Medium	12C 12D 12DD 12E 14A 14B	34C 34D 34DD 34E 36A 36B	34C 34D 34DD 34DDD 36A 36B
Large	14C 14D 14DD 14E 16A 16B 16C	36C 36D 36DD 36E 38A 38B 38C	36C 36D 36DD 36DDD 38B 38C
XL	16D 16DD 16E 18A 18B 18C 18D	38D 38DD 38E 40A 40B 40C 40D	38D 38DD 38DDD 40A 40B 40C 40D

Size	AU Size	UK Size	Waist (cm)
XS	04-06	00-02	60
Small	08-10	04-06	64
Medium	12-14	08-10	68
Large	16-18	12-14	72
XL	20-22	16-18	76
2XL	24-26	20-22	80

Size	Waist (cm)	Waist (in)
2XS / (Size 4/8)	53-56	21-22
XS / (Size 8/12)	57-66	23-26
Small	67-76	27-30
Medium	77-86	31-34
Large	87-97	35-38
Extra Large	98-107	39-42
2XL	108-115	43-45
3XL	116-125	46-49
4XL	126-133	50-52
5XL	134-143	53-56
6XL	144-150	57-59

Size	Waist (cm)	Waist (in)
4XS (Age & Size 3-4)	40-44	15-17
3XS (Age & Size 5-6)	45-51	18-20
2XS (Age & Size 7-8)	52-59	21-22
XS (Age & Size 9-11)	60-69	23-26
S (Ages & Size 12-14)	70-76	27-30

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SHOP MEN'S SHOP WOMEN'S SHOP JUNIOR'S

Boxer Brief Sport - Panthers

Boxer Brief Sport

Longer For Activity

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Boxer Brief Sport - Chameleons

Boxer Brief Sport

Longer For Activity

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Boxer Brief Sport - Velocity

Boxer Brief Sport

Longer For Activity

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★★★★★

The best undies you’ll ever buy – Great fit. Super comfortable. The glide panels mean no more chafing. 100% recommended.

SEAN S.

★★★★★

The sports boxer is a great product and very comfortable. The fabric they are made from doesn’t irritate.

TOM P.

★★★★★

Great fitting underwear. Very comfortable and feels good. Well worth the price. I've bought 5 pair of the sport so far.

JESSE C.