Features:

Sizing runs small so take that into consideration when determining a size 

 Size Back Length   Chest Neck 
X Small  9"  10"-13"  7"-9" 
Small  10 1/2"  12 1/2"-15 1/2"  9"-11" 
Medium   12" 14 1/2"-17 1/2"  9 1/2"-11 1/2" 
Large  14 1/2"  17 1/2"-20 1/2"  11 1/2"-13 1/2" 
1X Large 16 1/2" 19 1/2"-22 1/2 " 13"-15"
2X Large 18 1/2" 22 1/2"-25 1/2" 14 1/2"-16 1/2"