Leather Jacket Size Chart
Measure your chest, match it to the chart, order that size. Leather softens and moulds to you but it does not recover the way knitwear does, so it is worth two minutes with a tape measure rather than ordering the size on the label of a jacket you already own.
How to Measure Yourself
You need a soft tape measure and a t-shirt. Do not measure over a jumper, and do not pull the tape tight — it should sit flat against the body without pressing in.
Chest — the one that decides your size
Run the tape around the fullest part of your chest, under the arms and across the shoulder blades at the back. Keep it level all the way round. Breathe normally and read the number on the out-breath rather than while holding air in. This is the measurement that determines your jacket size at Decrum.
Waist
Measure around your natural waist, which sits above the hip bone at roughly the narrowest point of the torso. It is usually higher than where your jeans sit.
Sleeve
Start at the shoulder seam of a shirt that fits you, run the tape down the outside of a slightly bent arm, and finish at the wrist bone. Bending the elbow matters — a straight-arm measurement comes out short and gives you sleeves that ride up when you drive or reach.
Shoulder
Measure across the back from the outer edge of one shoulder seam to the other. Easier with a second person, or lay a jacket that already fits you flat and measure seam to seam.
Length
From the base of the collar at the back of the neck, straight down to where you want the jacket to end. Use this to check a cut finishes where you expect before you order.
Size Charts
Match the chest measurement you have just taken to the row in the chart below, then order that size. If your measurement sits between two rows, read the next section before deciding.
Men's Leather Jacket Size Chart
Women's Leather Jacket Size Chart
All measurements are body measurements in inches. If any figure in the chart is hard to read on your screen, email support@decrum.com with your chest measurement and we will tell you the size.
How Fit Changes by Jacket Style
Same chest measurement, different shape. The cut decides where a jacket sits and how much room it leaves, so it is worth knowing what you are ordering before you pick a size.
Biker
Cut close through the chest and short in the body, with an asymmetric zip that pulls the front across. Meant to sit snug. Go true to size — a biker one size up loses its line completely.
Cafe Racer
The closest fit in the range. Slim through the body, short at the hem, minimal collar. True to size if you want the intended look. Size up only if you dislike a fitted jacket.
Bomber
Ribbed cuffs and hem, wider through the body, shorter overall. The most forgiving shape here and the one that takes a jumper underneath best. True to size, or up one if you layer heavily.
Harrington
Shirt collar, straight body, finishes at the hip. Meant to sit close at the waist without pulling at the shoulder. True to size — a Harrington a size too big reads wrong in a way a bomber does not.
Trucker
Boxier through the body with a squared yoke, buttons rather than a zip. Sits true, but reads roomier than a biker at the same measurement.
Blazer
Structured shoulder, longer body, worn open more often than closed. Follow the shoulder measurement as well as the chest on this one, because the shoulder is what shows if it is off.
Coat
Car coats and 3/4 lengths are cut to go over other clothes. If you plan to wear one over a suit jacket or a heavy knit, size up half a step.
Once you have your size, browse men's leather jackets or women's leather jackets.
If You Fall Between Two Sizes
This is the most common question we get, and the answer depends on two things: what you plan to wear underneath, and which jacket.
Over a t-shirt or a shirt, take the smaller size. Real lambskin has natural stretch and settles to your shoulders after a few wears, so a jacket that feels close on day one is comfortable by week two. Taking the larger size to be safe usually ends with a jacket that never tightens up.
Over a hoodie or a wool sweater through winter, take the larger size — or stay with the smaller one in a bomber or coat cut, which already leaves room.
Still unsure, email support@decrum.com with your chest measurement and the jacket you are looking at, and we will confirm the size for that specific piece before you order.
Measurement Videos
If you would rather watch than read, these show the same measurements being taken.
Men's Measurement Guide
Women's Measurement Guide
Questions
How should a leather jacket fit?
Close through the chest and shoulders with room to move your arms, and no pulling across the back when you reach forward. The shoulder seam should sit on the edge of your shoulder, not below it. A leather jacket that fits properly feels slightly snug when new and settles within a few weeks of wear.
Should I size up in a leather jacket?
Only if you plan to layer a hoodie or a heavy knit underneath. For wear over a t-shirt or a shirt, order your measured size. Real lambskin softens and moulds to you, so a jacket bought a size up stays loose rather than tightening.
How do I measure my chest for a jacket?
Run a soft tape around the fullest part of your chest, under the arms and level across the back. Wear a t-shirt, keep the tape flat rather than tight, and read the number breathing normally.
Are Decrum jackets true to size?
Yes, against our charts, which list body measurements rather than garment measurements. Match your tape measurement to the chart rather than ordering the label size you usually buy — sizing varies enough between brands that the label is not a reliable guide.
Does leather stretch over time?
Lambskin gains a little across the shoulders and elbows with wear and moulds to your shape. It softens rather than growing a size, and it does not shrink back afterwards, which is why a slightly snug fit is the safer choice.
What if the jacket does not fit when it arrives?
Email support@decrum.com and we will arrange an exchange. It is quicker to send us your chest measurement before ordering and let us confirm the size for that jacket.
Shop by Size
Find Your Fit
You have your measurements. Now find the jacket.