Formal Vest - B-VST-23 Boys Vest Sizes: 3T = ( 3 - 4 years old ) , 4 = (5 - 6 years old ) - if unsure go one size larger. Boys Vest Sizes: 8 = (7 - 8 years old ) , 10 = (9 - 10 years old). - if unsure go one size larger. Navy Matching Bow Ties may be availble. Search for style number: BUYYOURTIES B-PBT-ADF-23 Matching Ties may be availble. Search for style number: BUYYOURTIES B-ADF-23