Measurements and Fit
MENS
  CHEST WAIST
  Inches Cm Inches Cm
X SMALL 35 89 28 72
SMALL 36 91 30 76
MEDIUM 38 97 32 81
LARGE 40 102 34 86
X LARGE 42 107 36 91
XX LARGE 45 114 38 97
LADIES
  CHEST WAIST
  UK Inches Cm Inches Cm
X SMALL 4-6 32 81 23-25 61
SMALL 8-10 34 86 26-28 69
MEDIUM 12 36 91 29-30 75
LARGE 14-16 38 97 31-33 81
HOW TO USE
CHEST & BUST. Place measuring tape under your arms, keeping tape level measure around the fullest part of your chest/bust.
WAIST. Measuring tape is placed at the narrowest point of your natural waist and measured around the body.
HIPS. Place feet together and measure around the fullest part of your hips.
For further reference please refer to individual product guide and model size. 
All measurements are for guidance purposes only.