Army Surplus Jacket Sizing Guide | Measure-First Fits

Army surplus jacket sizing hinges on chest circumference and body height matched to a specific chart, not civilian letter sizes alone.

Buying an army surplus jacket without measuring first is a gamble. Civilian letter sizing rarely maps cleanly onto military garments, which are cut roomier for layering. The dependable route for army surplus jacket sizing is simple: take your chest and height measurements, then match them to the seller’s chart. This guide shows you exactly how to do that.

Why Surplus Sizing Differs From Civilian Sizes

Military jackets are designed for function, not fashion. They accommodate underlayers and gear, so a “Medium” surplus jacket often fits like a civilian “Large.” Relying on your usual letter size leads to sleeves that swallow your hands or a torso that won’t zip over a sweatshirt.

The U.S. military typically labels jackets with a chest size and a length code like Short, Regular, or Long. Other systems use a numeric code for height and chest. All of them require the same starting point: accurate body measurements.

How To Measure For A Surplus Jacket

Grab a cloth tape measure and follow these two steps. Measure over underclothes, not bulky outerwear, because extra layers distort the reading.

1. Chest: Wrap the tape around the fullest part of your chest, just under your armpits. Keep it level and snug, but not tight. Take the number in inches.
2. Height: Stand flat against a wall and measure your total height in inches. Your height determines the jacket’s length (Short, Regular, or Long).

Use your exact numbers rather than rounding up. If your first measurement seems off, measure again and average the results.

Standard U.S. Surplus Sizing Charts

Here is the most common chest-based sizing system for U.S. surplus jackets, along with the standard height bands for jacket length.

Many sellers publish a USGI universal chart with nearly identical chest ranges: Small 33–37 in, Medium 37–41 in, Large 41–45 in, XL 45–49 in, and XXL 49–53 in.

If you plan to layer heavily, many surplus sources advise ordering one size up from your normal civilian size. This is especially true for outer layers like field jackets and parkas.

NATO, British, And Canadian Systems

International surplus gear uses different codes entirely. NATO-style combat jackets often use a height/chest format; for example, a “Regular Small” can appear as “7080/8494” in code. The height bands are SHORT 1.60–1.70 m, REGULAR 1.70–1.80 m, and LONG 1.80–1.90 m, with chest bands SMALL 84–94 cm, MEDIUM 94–104 cm, and LARGE 104–114 cm.

British Army charts ask for height, waist, and chest in centimeters, measured over underclothes. Canadian surplus tops use codes like 7036 or 7040, where the first two digits are height and the last two are chest width in inches; 7036 converts to a Small Regular, while 7040 converts to a Medium Regular. These systems are not interchangeable, so always confirm the country of origin and the specific chart on the product page.

Some sellers list flat garment measurements like pit-to-pit instead of body measurements. This method measures the jacket itself, not your body, so it requires a different comparison.

If you are uncertain between two sizes, the safest pick is often the larger one for outerwear. A slightly roomy jacket still layers well, while a tight one is useless in cold weather. When you are ready to browse tested options, our roundup of the best army surplus jackets on the market pairs these sizing rules with specific recommendations.