1 Logo Women’s organic crew neck sweatshirt

Base1 Active Size Guide

All measurements are approximate. For the best fit, measure yourself and compare to the charts below. If you're between sizes, size up for a relaxed fit or size down for a tighter, athletic fit.

How to Measure

• Chest: Measure around the fullest part of your chest, keeping the tape level.
• Waist: Measure around your natural waistline, just above your hip bones.
• Hips: Measure around the fullest part of your hips.
• Length: Measure from the highest point of the shoulder to the hem.

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Hoodies & Sweatshirts (Unisex / Oversized)

Our hoodies run oversized. Order your usual size for the intended relaxed fit.

Size	Chest (cm)	Length (cm)	Sleeve (cm)
XS	53	66	61
S	55	69	63
M	58	72	65
L	61	74	67
XL	64	76	69
2XL	67	78	71
3XL	70	80	72

T-Shirts (Unisex / Oversized)

Our oversized tees have a drop-shoulder, relaxed fit. Order your normal size.

Size	Chest (cm)	Length (cm)	Sleeve (cm)
S	53	72	23
M	56	74	24
L	59	76	25
XL	62	78	26
2XL	65	80	27
3XL	68	82	28
4XL	71	84	29

T-Shirts (Classic / Regular Fit)

Size	Chest (cm)	Length (cm)
XS	46	66
S	48	69
M	51	72
L	53	74
XL	56	76
2XL	59	78

Joggers & Sweatpants

Size	Waist (cm)	Hip (cm)	Inseam (cm)
S	74	96	74
M	79	101	76
L	84	106	78
XL	89	111	79
2XL	94	116	80

Shorts

Size	Waist (cm)	Hip (cm)	Length (cm)
S	74	96	47
M	79	101	48
L	84	106	49
XL	89	111	50
2XL	94	116	51

Leggings & Sports Bras (Women's)

Performance fit — stretchy fabric, order your usual size.

Size	Waist (cm)	Hip (cm)	Inseam (cm)
XS	60	83	69
S	64	88	70
M	68	93	71
L	74	99	72
XL	80	105	73

Swim Trunks

Size	Waist (cm)	Hip (cm)	Outseam (cm)
2XS	72	90	41
XS	76	94	42
S	80	98	43
M	84	102	44
L	90	108	46
XL	96	114	48
2XL	102	120	50

Basketball Jerseys & Tanks

Size	Chest (cm)	Waist (cm)	Hip (cm)
2XS	88	72	90
XS	92	76	94
S	96	80	98
M	100	84	102
L	108	92	110
XL	116	100	118
2XL	124	108	126
3XL	132	116	134

Hats & Beanies

One size fits most. Snapbacks have an adjustable closure. Beanies are stretchy acrylic — one size fits all.

Style	Circumference (cm)
Snapback Cap	54-60 (adjustable)
Cuffed Beanie	48-58 (stretch fit)

Kids

Age	Size	Chest (cm)	Length (cm)
3-4	3/4Y	56	42
5-6	5/6Y	60	46
7-8	7/8Y	64	50
9-11	9/11Y	70	55
12-14	12/14Y	78	62

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Still unsure? Email us at matt@baseone.uk with your height, weight, and usual size, and we'll recommend the best fit for you.

Made to order — please allow 3-7 business days for production before shipping.

UK delivery: 2-5 business days from dispatch (from £1.85)

International: 5-20 business days depending on location

Returns: 30 days for faulty or damaged items. See our Returns Policy for full details.

Free shipping on orders over £75 with code FREESHIP75.

We use premium, responsibly sourced materials across our range:

• Organic cotton — GOTS certified, grown without pesticides
• Recycled polyester — made from post-consumer plastic bottles
• Performance blends — moisture-wicking and quick-dry fabrics

Every Base1 product is made on demand — zero overproduction, zero waste. Better for you, better for the planet.