The T-Shirt Whore Size Chart for Women's tees:
S (SIZE 0-2): CHEST 30-32/ WAIST 25-26
M (SIZE 4-6 ): CHEST 32-34/WAIST 27-28
L (SIZE 8-10 ): CHEST 36-38/ WAIST 30-32
XL (SIZE 12-14): CHEST 40-42/ WAIST 33-35
XXL (SIZE 16-18): CHEST 44-46/ WAIST 36-38