Allbirds Fit Guide for Underwear

Allbirds products fit true to size for most customers. Here's how you find your measurements:

WOMEN'S UNDERWEAR

For your waist, measure around your natural waistline.
For your hips, measure around the fullest part of your hip bones.

Allbirds Size	Bust (Inches)	Cup Size	Waist (Inches)	Hips (Inches)
XS	31-34	32A/B	24-25	34-36
S	34-36	32C/D, 34A/B	26-27	37-38
M	36-38	32DD, 34C/D, 36 A/B	28-29	39-40
L	38-40	34DD, 36C/D/DD, 38B/C	30-32	41-42
XL	40-42	38D/DD, 40A/B/C	33-35	43-44
XXL	42-46	40D/DD, 42B/C/D	36-38	45-46
XXXL	46-47	42DD, 44D	39-40	47-48

MEN'S UNDERWEAR

For your waist, measure around your natural waistline.

Allbirds Size	Waist (Inches)	Waist (cm)
S	28-30	70-75
M	32-34	80-85
L	36-38	90-95
XL	40-42	100-105
XXL	44-46	112-117

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The Allbirds Approach

Wear-All-Day Comfort

Lightweight, bouncy, and wildly comfortable, Allbirds shoes make any outing feel effortless. Slip in, lace up, or slide them on and enjoy the comfy support.

Sustainability In Every Step

From materials to transport, we’re working to reduce our carbon footprint to near zero. Holding ourselves accountable and striving for climate goals isn’t a 30-year goal—it’s now.

Materials From The Earth

We replace petroleum-based synthetics with natural alternatives wherever we can. Like using wool, tree fibre, and sugar cane. They’re soft, breathable, and better for the planet—win, win, win.