Size Chart

Use your body measurements to find the best fit. If you are between sizes, choose the larger size for a relaxed fit or the smaller size for a more compressive feel.

US / UK / EU Conversion (Women’s Alpha Sizes)
Buyco Size US UK EU
XS 0–2 4–6 32–34
S 4–6 8–10 36–38
M 8–10 12–14 40–42
L 12–14 16–18 44–46
XL 16–18 20–22 48–50
XXL 20–22 24–26 52–54

Women’s Tops & Sports Bras

Measure Bust at the fullest point and Underbust around the ribcage. For high-impact support, choose the smaller size if between sizes.

Sports Bras & Tops — Body Measurements
Buyco Size Bust (in) Bust (cm) Underbust (in) Underbust (cm) Typical Cup Range
XS 31–33 79–84 25–27 63–68 30A–32B
S 33–35 84–89 27–29 68–74 32B–34C
M 35–37.5 89–95 29–31 74–79 34C–36D
L 37.5–40.5 95–103 31–34 79–86 36D–38DD
XL 40.5–44 103–112 34–37 86–94 38DD–40E
XXL 44–48 112–122 37–40 94–102 40E–42F

Women’s Bottoms (Leggings, Shorts, Joggers)

Measure Waist at your natural waistline and Hips at the fullest point. Inseam shown is our standard full-length legging; 7/8 styles run ~2–3 in shorter.

Bottoms — Body Measurements
Buyco Size US UK EU Waist (in) Waist (cm) Hips (in) Hips (cm) Inseam* (in)
XS 0–2 4–6 32–34 24–26 61–66 34–36 86–91 27.5–28.5
S 4–6 8–10 36–38 26–28 66–71 36–38 91–97 27.5–28.5
M 8–10 12–14 40–42 28–31 71–79 38–41 97–104 28–29
L 12–14 16–18 44–46 31–34 79–86 41–44 104–112 28.5–29.5
XL 16–18 20–22 48–50 34–38 86–97 44–48 112–122 29–30
XXL 20–22 24–26 52–54 38–42 97–107 48–52 122–132 29–30

*7/8 leggings inseam typically runs 2–3 inches shorter than the full-length inseam above.

How to Measure

Bust: Measure around the fullest part of your chest. Tops & Bras
Underbust: Measure snugly around the ribcage, just under the bust. Sports Bras
Waist: Measure around your natural waistline (the narrowest point). Bottoms
Hips: Measure around the fullest part of your hips/seat. Bottoms
Inseam: Measure from the inside top of your leg to the ankle bone.

Fit tips: Compression styles feel snug by design; if you prefer a relaxed feel or are between sizes, size up. Fabric stretch and design details may vary slightly by style.