A leather jacket that fits correctly is one of the best garments you can own. A leather jacket that doesn't fit is an expensive problem — because unlike fabric jackets, leather cannot be easily altered after the fact. Getting the measurements right before the garment is cut is the only reliable way to ensure a correct fit.
This guide covers every measurement you need for a custom leather jacket, how to take each one accurately, and the mistakes that most commonly cause fit problems. If you're still deciding which jacket style is right for you, our guide on what makes a good leather biker jacket covers construction, hardware, and what to look for before you buy.
Why Jacket Measurements Are Different From Pants Measurements
Leather pants measurements are primarily about circumference — waist, hip, thigh, calf. Leather jacket measurements involve a more complex set of dimensions because a jacket fits across the upper body in multiple directions simultaneously.
The chest, shoulders, and sleeve length all interact. A jacket that fits at the chest but has shoulders that are too wide will look wrong regardless of how accurate the chest measurement is. A sleeve that is the right length but attached at the wrong shoulder point will pull and restrict movement. All four primary measurements need to be correct together.
What You'll Need
A soft fabric measuring tape. Stand straight and relaxed in front of a mirror if possible, or have someone take your measurements — jacket measurements are significantly more accurate with assistance than self-measured.
Wear a fitted t-shirt or light shirt when measuring. Don't measure over a thick jumper or hoodie — this adds bulk that will result in a jacket that is too large. The leather jacket will be worn over a light layer in most cases, so measure accordingly.
Measurement 1: Chest
The chest measurement is the foundation of jacket sizing. Measure around the fullest part of your chest — typically across the nipple line — keeping the tape horizontal and parallel to the floor. Keep the tape snug but not tight; you should be able to breathe normally with the tape in place.
Keep your arms relaxed at your sides when measuring. Raising your arms changes the chest measurement and will result in a jacket that is too large across the chest when your arms are down.
Take the measurement twice and use the larger reading. Chest measurements can vary slightly depending on posture and breathing.
Common mistake: Measuring too high (across the upper chest rather than the fullest point). This gives a reading that is too small and results in a jacket that pulls across the chest.
Measurement 2: Shoulders
The shoulder measurement is the most critical dimension for jacket fit and the hardest to correct after construction. If the shoulders are wrong, the entire jacket sits incorrectly — the sleeves hang at the wrong angle, the back pulls or sags, and the overall silhouette is off.
Measure from the edge of one shoulder to the edge of the other — across the back, from the point where the shoulder meets the arm on each side. This point is called the shoulder seam point, and it's where the sleeve of the jacket will be attached.
This measurement is very difficult to take accurately on yourself. Have someone help you, or measure the shoulder width of a jacket that fits you correctly and use that measurement instead.
Common mistake: Measuring too wide (past the natural shoulder point onto the upper arm). This results in a jacket with shoulders that overhang the natural shoulder line, which looks wrong and causes the sleeves to hang incorrectly.
Measurement 3: Sleeve Length
Sleeve length is measured from the shoulder seam point — the same point used for the shoulder measurement — down the outside of the arm to the wrist bone, with the arm slightly bent.
Measure with the arm slightly bent rather than fully extended. A sleeve measured on a straight arm will be too short when the arm is bent, which is the natural position when wearing a jacket.
The sleeve should end at the wrist bone — the prominent bone on the outside of the wrist. This is the standard sleeve length for a jacket. If you prefer a slightly longer or shorter sleeve, note this when submitting your measurements.
Consider what you'll typically wear under the jacket. If you regularly wear long-sleeved shirts or jumpers under leather jackets, you may want the sleeve to be slightly longer to allow the underlayer to show at the cuff.
Common mistake: Measuring sleeve length from the neck rather than the shoulder point. This gives a reading that includes the shoulder width and results in sleeves that are far too long.
Measurement 4: Body Length
Body length is measured from the top of the shoulder — at the base of the neck — straight down to where you want the jacket to end. For a standard biker jacket, this is typically at the hip bone or just below. For a longer jacket or coat, it extends further.
Think about how you'll wear the jacket and what you'll wear it with. A jacket that ends at the hip bone works well with jeans and leather pants. A jacket that ends at the upper thigh has a different proportion and suits different styling.
If you're unsure about body length, measure a jacket you already own that you're happy with the length of and use that measurement.
Common mistake: Not specifying body length at all and assuming the manufacturer will choose correctly. Body length preference varies significantly between individuals and styles — always specify it explicitly.
Measurement 5: Waist (for fitted jackets)
For jackets with a defined waist — fitted styles that taper at the midsection rather than hanging straight — a waist measurement is also needed. Measure around your natural waist, the narrowest part of your torso, the same way as for leather pants.
For straight or relaxed-fit jackets that don't taper at the waist, this measurement is less critical. But for any jacket with a fitted silhouette, the waist measurement determines how much the jacket tapers and where.
Optional: Bicep
For jackets with fitted sleeves, a bicep measurement can be useful. Measure around the fullest part of your upper arm — typically the bicep — with the arm relaxed. This ensures the sleeve has enough room through the upper arm without being excessively wide.
Most standard jacket patterns have enough ease in the sleeve to accommodate a range of bicep sizes, but if you have particularly large arms relative to your chest measurement, it's worth providing this measurement explicitly.
How Jacket Measurements Work Together
The four primary measurements — chest, shoulders, sleeve length, and body length — need to be considered together, not independently. A jacket is a three-dimensional garment, and each measurement affects how the others work.
The chest and shoulders determine the overall width of the jacket. The sleeve length is set relative to the shoulder point, so if the shoulder measurement is wrong, the sleeve length will also be wrong even if it was measured correctly. The body length is independent of the other measurements but affects the overall proportion of the finished garment.
This is why it's important to provide all measurements rather than just the ones you're confident about. A manufacturer working with complete measurements can produce a jacket that fits correctly. A manufacturer working with partial measurements has to make assumptions — and assumptions in leather are expensive to correct.
Measuring From an Existing Jacket
If you have a leather jacket or structured jacket that fits you well, measuring it directly is a reliable alternative to body measurements. Lay the jacket flat on a surface and measure:
- Chest: across the chest from armhole to armhole, then double the measurement
- Shoulders: from shoulder seam to shoulder seam across the back
- Sleeve length: from the shoulder seam point to the end of the cuff
- Body length: from the top of the shoulder seam to the hem
Garment measurements taken this way already include the ease built into the original jacket. When submitting these to a made-to-measure manufacturer, note that they are garment measurements rather than body measurements — this affects how the manufacturer uses them.
Measurement Summary
For a custom leather jacket, the measurements you need are:
- Chest — around the fullest part of the chest, tape horizontal
- Shoulders — from shoulder point to shoulder point across the back
- Sleeve length — from shoulder point to wrist bone, arm slightly bent
- Body length — from top of shoulder to desired hem point
- Waist — for fitted styles only, around the natural waist
All measurements in centimetres or inches — not mixed. If measuring from an existing garment, note this when submitting.
Care and Longevity
Once your jacket arrives, proper care ensures it lasts for decades. For a complete routine covering conditioning, cleaning, and storage, see our leather care and maintenance guide.
At Attileo Leather
Every leather jacket we make is made to measure to your actual body measurements. We cut each jacket to the measurements you provide — not from a standard size chart. For a full overview of all the custom leather garments we make and how the made-to-measure process works across different product types, see our custom leather clothing complete guide. If you have questions about any measurement or want guidance before ordering, contact us — we'd rather spend a few minutes helping you measure correctly than have you receive a jacket that doesn't fit the way it should.
