Thread colours change based on colour selected they are as follows:
Black, Navy, Dusty Green, Dusty Pink, Airforce - White Thread
Burgundy, Bottle Green - Cream Thread
Grey, White - Black Thread
Sand - Brown Thread 
 
Chest Sizes
 
3-4 : 28"
5-6: 30"
7-8: 32"
9-11: 34"
12-14: 36"