These charts are provided to give you a guideline to sizing.
They are not exact garment measurements.
 

                                                    X-Small           Small                Medium             Large                 X-Large          XX-Large        

Chest 34-35 36-38 39-41 42-45 46-48 49-51
Neck 14-14 1/2 15-15 1/2 15 1/2-16 16 1/2-17 17-17 1/2 17 1/2-18
Sleeve 31-32 32 1/2-33 1/2 34-35 35-36 36-37 37-38
Waist 28 29-30 31-33 34-36 38 40-42
Inseam* 30-31 30-31 32-33 32-33 32-33 32-33
Women's Size
Conversion
4-6 8-10 12-14 14-16
* Inseam will vary depending on style; when lengths are offered, regular is 32 and long is 34.
Measurements refer to body size, not garment dimensions, and are in inches, unless otherwise noted.