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Buying a motorcycle jacket is different from buying a regular fashion jacket. A riding jacket is designed to protect you, so getting the right size is just as important as choosing the right style. If your jacket is too loose, the armor may move out of place during a fall. If it is too tight, it can make riding uncomfortable, especially on longer trips.
If you're asking, "What size Alpinestars jacket should I get?", the answer depends on your body measurements, riding style, and the type of jacket you choose. In this guide, you'll learn how to measure yourself, understand Alpinestars sizing, and avoid common sizing mistakes so you can buy with confidence.
A motorcycle jacket does much more than keep you warm. It is part of your riding safety gear.
A properly fitted Alpinestars motorcycle jacket helps keep the CE-rated shoulder, elbow, and back armor in the correct position. This allows the protective gear to work as intended if you ever slide or fall.
A good fit also makes riding more comfortable by reducing wind flap, improving movement, and helping you stay focused on the road.
Instead of choosing a size based on your usual T-shirt or hoodie, always use your actual body measurements.
The most reliable way to find your size is to measure yourself with a soft measuring tape and compare the numbers with the official Alpinestars size chart.
The most important measurement is your chest, but your waist, sleeve length, and overall body shape also play a role.
As a general rule:
Every jacket model is slightly different, so checking the size chart before ordering is always a smart idea.
Taking accurate measurements only takes a few minutes, but it can save you from ordering the wrong size.
Wrap a measuring tape around the fullest part of your chest while keeping the tape level across your back.
Keep the tape snug but not tight.
This measurement is the most important when choosing an Alpinestars jacket.
Measure around your natural waist, just above your hips.
Many touring and textile jackets include adjustable waist straps, but starting with the correct size will always provide the best fit.
Measure from the top of your shoulder to your wrist while your arm is slightly bent.
A properly sized sleeve should cover your wrists when your hands are on the handlebars.
A motorcycle jacket should feel secure rather than loose.
When you first put it on, especially a leather model, it may feel slightly snug around the shoulders and chest. This is completely normal because motorcycle jackets are designed for a riding position, not standing casually.
A well-fitting jacket should:
If the armor shifts easily when you move your arms, the jacket is probably too large.
Race jackets have the closest fit.
They are designed for sport bikes and track riding, where a snug fit improves protection and reduces wind resistance.
Do not expect these jackets to feel loose.
Sport-fit jackets offer a balance between comfort and performance.
They are popular with riders who enjoy weekend rides, canyon roads, and everyday street riding.
Most riders find this fit comfortable without feeling oversized.
Touring jackets are built for longer rides.
If you spend hours on the road, a touring fit is often the most practical choice.
Leather naturally softens and stretches slightly as you wear it.
A new leather jacket should feel snug but should never cause pain or restrict normal movement.
After several rides, it will gradually mold to your body.
Textile motorcycle jackets usually feel comfortable right away.
They often include stretch panels, adjustable straps, and waterproof or breathable materials, making them ideal for commuting and touring.
This is one of the most common questions riders ask.
The answer depends on your body type and riding habits.
Sizing up may be a good idea if you:
However, avoid buying a jacket that is noticeably loose. Protective armor works best when it stays close to your body.
If possible, try the jacket while sitting in your normal riding position.
Raise your arms as though you're holding your motorcycle handlebars.
Pay attention to how the jacket feels across your shoulders, elbows, and chest.
The armor should stay in place without shifting, and the jacket should allow natural movement without excessive pressure.
If you're buying online, compare your measurements carefully with the manufacturer's sizing guide instead of relying only on customer opinions, as body shapes vary from rider to rider.
Choosing the right Alpinestars jacket size is about more than comfort—it's an important part of your riding safety. A properly fitted jacket keeps the protective armor where it belongs, allows comfortable movement on the motorcycle, and performs as designed in everyday riding conditions.
The best approach is simple: measure your chest, waist, and sleeve length, compare those measurements with the official size chart, and think about how you'll use the jacket. Whether you're buying a race-focused leather jacket or a touring textile model, taking a few extra minutes to choose the correct size can make every ride safer, more comfortable, and more enjoyable.
