GymBum UK Size Guide

GYMBUM UK®

Size Guide


1️⃣ Women – Sports Bras

Measure Yourself

For accurate sizing, keep the tape measure level and parallel to the ground.

Bust
Measure around the fullest part of your chest.

Underbust
Measure directly under your bust where the bra band sits.


Body Measurements (Inches)

Size Bust Underbust
XS 33–34" 27–28"
S 34–36" 28–30"
M 36–38" 30–32"
L 38–40" 32–34"
XL 40–43" 34–36"
2XL 43–46" 36–39"
3XL 46–49" 39–42"

Between sizes?
Size up for a more comfortable fit.
Size down for a more compressive performance fit.


2️⃣ Women – Tops & T-Shirts

Body Measurements (Inches)

UK Size Bust Waist
4–6 31–33" 24–26"
8–10 33–36" 26–28"
12–14 36–40" 28–32"
16 40–43" 32–34"
18 43–46" 34–37"

3️⃣ Women – Leggings & Shorts

Body Measurements (Inches)

UK Size Waist Hips
4–6 24–26" 34–36"
8–10 26–28" 36–38"
12–14 28–32" 38–42"
16 32–34" 42–44"
18 34–37" 44–46"

4️⃣ Men – Tops & Hoodies

Size Chest Waist
S 36–38" 30"
M 38–40" 32–34"
L 42–44" 36"
XL 46–48" 38"
XXL 50–52" 40–42"

5️⃣ Men – Shorts & Joggers

Size Waist
S 30"
M 32–34"
L 36"
XL 38"
XXL 40–42"

Fit & Sizing Notes

  • Some styles follow Asian sizing and may run 1–2 sizes smaller than standard UK sizing.

  • Refer to each product description for specific fit details.

  • Measurements may vary slightly depending on fabric and cut.