Measurement in Inches.  Size XS : 32-33 Bust.  24.5-25.5 Waist.  35-36 Hips.  Size S :   34-35 Bust  26.5-27.5 Waist  37-38 Hips.  Size M: 36-37 Bust 28.5-29.5 Waist 39-40 Hips.  Size L: 38-39.5 Bust 30.5-32 Waist 41-42.5 Hips.  Size XL: 40.5 - 42 Bust 33-34.5 Waist 43.5-45 Hips
HOW TO MEASURE 
Chest: Take your measuring tape under your arms and around the fullest part of your chest. Ensure the tape measure is level all around - using a mirror or having a friend helps! 
Waist: Stand in front of a mirror and bend from side to side - this is how to find your natural waist point! Take the tape measure around this point to find your waist measurement, ensuring tape measure is level aril around. 
Hips: Measure around the fullest part of your hips. This is normally 6-8" below your natura
HOW TO SELECT YOUR SIZE 
1. Does this garment have any stretch? If yes then there will be some give if you are in between sizes. If the garment is rigid without stretch, you might want to size up if you are between sizes. Stretch can be from the fabric, elastic panels or smocking panels just to name a few. 
2. What is the tightest part of the garment? On Top or Blouse it is typically the chest. On a Dress it is typically the waist. On a Pant or Skirt it is typically the waist and or hips. Consider the fit