Buying Guide: Do Bomber Jackets Run Small or Large?
The sizing answer depends on the brand, the material, and the silhouette style. Here is what actually determines whether a bomber jacket will fit you, and exactly how to get it right before you buy.
Bomber jackets run differently across brands, materials, and silhouette styles. What runs true to size in one brand runs large in another. What fits correctly in nylon runs small in leather. This guide gives you the specific variables that cause sizing variation and exactly what to check before purchasing from any brand.
The Short Answer by Category
Full-grain leather bombers: typically run true to size, but with less stretch accommodation than fabric jackets, making the consequences of being half a size off more significant. Nylon MA-1 style bombers: often run slightly large due to their relaxed design heritage and the surplus sizing tradition from which they derive. Wool or varsity-style bombers: often run true to size but with a more fitted chest than equivalent nylon versions. Budget or fast-fashion leather bombers: sizing is inconsistent and cannot be predicted from the label alone. Always measure and compare to stated dimensions rather than trusting the size label.
Why Leather Specifically Requires More Sizing Precision
A cotton or nylon jacket that is half a size too small may feel only marginally uncomfortable, because the fabric has some give that leather lacks. A full-grain leather jacket at the same half-size-too-small measurement will feel noticeably restrictive, particularly across the back when you raise your arms or reach forward. The consequences of a sizing error are more perceptible in leather than in fabric, which means the sizing decision requires more precision.
This is not a reason to avoid leather. It is a reason to measure carefully. A correctly sized leather bomber fits perfectly from the first wear and improves from there. For complete measurement instructions, see how to choose the right size when buying a leather jacket.
Variables That Cause Brand-to-Brand Size Differences
Chest ease built into the pattern: some brands cut their bombers with more ease (additional room) built into the chest at each size, making their jackets feel roomier than others at the same nominal size. Premium brands targeting a fitted aesthetic typically cut with 2 to 4 cm of ease. Brands targeting a relaxed or streetwear fit may cut with 6 to 8 cm or more.
Shoulder width per size: shoulder width scaling is not standardised across brands. A brand that scales shoulder width aggressively may produce a size M that fits a 42 inch chest but has a shoulder width suited to a 43 or 44 inch chest. Checking both measurements independently is the only way to catch this discrepancy.
Body length: bomber jacket body length varies significantly by brand and silhouette style. Some brands produce bombers with body lengths more appropriate to a blouson or hip-length jacket. Always check body length in the size specifications and compare it to your own shoulder-to-waist measurement.
Material stretch: nylon stretches more than leather. A nylon bomber sized to your exact chest measurement may feel comfortable with some ease of movement. A leather bomber sized to your exact chest measurement will feel closer to body-size with less ease. Size up by one if you want the leather bomber to feel as roomy as a nylon bomber at the same nominal chest size.
How to Size for Decrum Leather Bombers Specifically
Decrum men's leather bombers and women's leather jackets run true to size based on body chest measurements. The size charts use body measurements (not garment measurements), and the fit allowance is built in. Find your chest measurement in the chart and that is your size. If you are between sizes, size up. If you plan to layer a slim hoodie or knit underneath, size up one from your chest measurement size.
The Shoulder Measurement: The Most Overlooked Variable
Most buyers check the chest measurement and ignore the shoulder width. This is the most common source of fit dissatisfaction with leather jackets. A bomber can fit correctly in the chest while having a shoulder seam that sits off the shoulder tip because the brand scales shoulder width differently from chest at each size. Always measure your shoulder width and compare it to the brand's stated shoulder measurement for your size, not just the chest measurement.
Edinburgh Dark Brown Hooded Bomber
Full-grain lambskin with a removable hood. Built for layering and every season.
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Practical Checklist Before Purchasing Online
Measure your chest and shoulder width
Chest: tape around the fullest point of your chest, parallel to the floor. Shoulder: tip to tip across the back. Record both in inches.
Find the brand's size chart using body measurements
Some brands publish garment measurements (the dimensions of the jacket itself). Others publish body measurements (what body size the jacket is designed for). Confirm which you are reading before comparing. Body measurements are what you want to match to your own figures.
Check body length independently
Measure your own shoulder-to-waistband distance. The brand's stated body length should be approximately equal to this figure for a correctly proportioned bomber. If it is significantly longer, the jacket will sit below the waistband and lose the bomber silhouette.
Read the brand's fit notes carefully
Quality brands publish specific fit guidance: whether the jacket runs true to size, slim, or relaxed. If a brand does not publish this information, check independent reviews specifically mentioning fit. Size comments from actual buyers are more reliable than general size chart comparisons.
Check the return policy before purchasing
Even with careful measurement, a fit that looks correct on paper may feel different in person in leather versus other materials. Always purchase from a brand with a clear, hassle-free return policy. Decrum offers 30-day easy returns for exactly this reason.
Measure your chest and shoulder. Match to the body measurement chart. If between sizes, go up. If planning to layer a slim hoodie underneath, go up one. Check body length against your own shoulder-to-waist measurement. Confirm the return policy. These five steps eliminate the vast majority of sizing errors for leather bomber purchases.
Frequently Asked Questions
