Size Guide

Size & Fit Guide

Finding the right fit is essential for performance. All Allen Fitness apparel is designed with an Athletic Fit. If you prefer a slightly looser lifestyle feel, we recommend sizing up.

Not sure? Contact us and we'll help you find the right size.

Women's Apparel

Measured in inches

Size UK Size Waist Hips Chest
XS 6–8 24–26" 34–36" 32–34"
S 8–10 26–28" 36–38" 34–36"
M 10–12 28–30" 38–40" 36–38"
L 12–14 30–32" 40–42" 38–40"
XL 14–16 32–34" 42–44" 40–42"

Men's Apparel

Measured in inches

Size UK Chest Chest Waist Hips
S 34–36 34–36" 28–30" 34–36"
M 38–40 38–40" 32–34" 38–40"
L 42–44 42–44" 36–38" 42–44"
XL 46–48 46–48" 40–42" 46–48"

Compression Wear

Measured in cm — measure around the thigh at its widest point

Size Thigh Circumference
M 33–41 cm
L 41–48 cm
XL 48–53 cm

How to Measure

  • Chest: Measure around the fullest part of your chest, keeping the tape horizontal.
  • Waist: Measure around the narrowest part — typically where your body bends side to side.
  • Hips: Measure around the fullest part of your hips with feet together.
  • Thigh (compression): Measure around the widest part of your thigh.

Still unsure? Get in touch — we're happy to help you find the perfect fit.