Chest sizes in inches:
Size 2 (up to 29), 4 (29-30), 6 (30-31), 8 (31-32), 10 (32-33)
12 (33-34), 14 (34-35), 16 (35-36), 18 (36-37), 20 (37-38).

Kids Military B.D.U. Pants:

Waist sizes in inches:
Size 2 (18-22), 4 (20-24), 6 (21-25), 8 (22-26), 10 (23-27),
12 (24-28), 14 (25-29), 16 (26-30), 18 (27-31), 20 (28-32).

Kids Flightsuits:

Chest sizes in inches:
Size Small (Up to 26), Medium (26-30),
Large (30-34), XLarge (34-38).

Kids Vintage Fatigues:

Waist sizes in inches:
XSmall(23"), Small(25"), Medium(27"),
Large(29"), XLarge(31")