Chest size in inches:
Small (33-37), Medium (37-41), Large (41-44), XLarge (44-47),
2XL (47-50), 3XL (50-52), 4XL (52-54), 5XL (54-56).

Vintage Fatigues:

Waist size in inches:
XSmall (23-27), Small (27-31), Medium (31-35), Large (35-39),
XLarge (39-43), 2XL (43-47), 3XL (47-51). 4XL (51-55).
Inseam in inches (29 1/2-32 1/2).

T-Shirts & Tank Tops:

Chest size in inches;
XSmall (32"), Small (35"), Medium (38"), Large (42"),
XLarge (46"), 2XL (50"), 3XL (54"), 4XL (58"), 5XL (62").

Travel Vests:

Chest size in inches:
Small (42"), Medium (45"), Large (51"),
XLarge (54"), 2XL (57"), 3XL (60").

Safari Outback Jackets & Vests:

Chest size in inches:
Small (42"), Medium (45"), Large (48"),
XLarge (52"), 2XL (60"), 3XL (64").

M-65 Field Jackets:

Chest size in inches:
Small (33-37), Medium (37-41), Large (41-45),
XLarge (45-49), 2XL (49-53), 3XL (53-57).

N-3B Parkas:

Chest size in inches:
Small (45"), Medium (47"), Large (49"),
XLarge (51"), 2XL (53"), 3XL (55").

Boonie Hats & Fatigue Caps:

Head size in inches:
XSmall (Size 6 3/4, Head size 21 1/8"), Small (Size 7, Head size 21 7/8"),
Medium (Size 7 1/4, Head size 22 5/8"), Large (Size 7 1/2, Head size 23 1/2"),
XLarge (Size 7 3/4, Head size 24 3/8").

Military Type Sweaters:

Chest size in inches:
Small (34), Medium (36), Large (38), XL (39),
2XL (40), 3XL (41), 4XL (42), 5XL (43).

Womens, Kids Sizing Chart links left side of page.