How do I measure my chest size by myself?

You can measure your chest using a mirror and a flexible tape measure. Just wrap the tape around the fullest part of your chest and check your position carefully to make sure the tape stays level.

Should I measure my chest size in inches or centimetres?

Most UK brands, including Jacamo, use inches for suit and shirt sizing, so you might find it helpful to measure in inches right away. It’s always handy to note down both measurements though, just so you’re geared up for looking at any size chart.

What’s the average chest size for men in the UK?

Chest sizes vary hugely, but many men fall between 38 and 44 inches. Rather than looking at the average, it’s much more important to focus on finding your own individual measurement.

Should I measure my chest over clothes?

To get the most accurate result, it’s best to measure over bare skin or a very thin layer, like a vest. Thick clothing can add extra inches to your measurement, which can affect how well your new items fit.

How tight should the measuring tape be?

The tape should be snug but not restrictive - you should be able to comfortably slide one or two fingers underneath it.

Why does my shirt pull across the chest?

This usually means that the chest size is too small. Try a larger size or a different fit - regular instead of slim, for example.

Is chest size the same as jacket size?

Yes, in UK sizing your chest measurement in inches usually matches your jacket size.

How often should I measure myself?

It’s best to check your measurements every six months or before investing in significant pieces, like a new suit. Changes in fitness and lifestyle can affect your chest and clothing size, so it’s good to re-measure fairly regularly.

What if I’m between two chest sizes?

If your measurement falls between two sizes, we generally recommend choosing the larger size - it’s much more comfortable to wear something that’s a little loose than something that’s too restrictive.

Does my height affect my chest size?

Height won’y effect your chest measurement, but it will affect how clothes sit on your body. At Jacamo, our big and tall ranges are designed so that length is perfectly proportioned to chest size.

How do I measure for a waistcoat?

The process is identical to measuring for a shirt, but since a waistcoat is the innermost layer of a suit, it should fit very closely. With that in mind, keep the tape snug while you measure, and make sure that just one finger fits underneath (not two) for a sharper finish.

Model wears Tailored Single Breasted Blazer in Brown

HOW TO MEASURE CHEST SIZE FOR MEN

A SIMPLE GUIDE FOR THE PERFECT FIT

Getting the right chest measurement is key to finding clothes that fit. Whether you’re buying everyday essentials or investing in sophisticated tailoring, knowing how to measure your chest will guarantee comfort, confidence and a clean silhouette.

Not sure how to find your size? Don’t worry. This guide goes through it step by step so you can measure your chest at home, convert your measurements into UK sizes, and apply those measurements to your next shirt and suit jacket selection.

WHY CHEST MEASUREMENT MATTERS

Chest measurement is one of the most important sizing points in menswear, since it determines how clothes will sit on your torso, shoulders and upper back.

In casual pieces, a slight wrong size may go unnoticed. But in more structured pieces like men’s formal shirts or suit jackets, even a small difference can affect the overall fit.

A chest size that’s too small can feel restrictive as it pulls across the front. A size that’s too big can mean baggy fabric, dropping shoulders and a less polished look.

Getting this measurement right helps you choose men’s clothing that actually fits your unique shape.

WHAT YOU NEED TO MEASURE YOUR CHEST

Accuracy is key when measuring your chest, so make sure you have:

A flexible fabric measuring tape
A mirror to check positioning
Ideally someone to help you measure

If you’re measuring alone, you can still get a good result by taking your time and checking your position carefully.

HOW TO MEASURE CHEST SIZE AT HOME

It takes just a few simple steps.

1. STAND NATURALLY

Stand up naturally with your arms relaxed by your sides. Avoid puffing out your chest or holding your breath, as this will give an inaccurate reading.
If you’re sizing up for everyday clothes, you can wear a light t-shirt while you measure. For more precise results, measure against bare skin.

2. MEASURE THE FULLEST PART OF YOUR CHEST

Wrap the tape around the widest part of your chest. This is usually across the nipples and around your shoulder blades.

Make sure the tape passes under your arms and sits high enough on your back to capture the full width of your torso.

3. KEEP THE TAPE LEVEL

Check in the mirror that the tape is horizontal all the way around your body. If it dips at the back or rises at the front, your measurement won’t be accurate.

A level measurement is essential for choosing the correct men’s clothing size.

4. ALLOW FOR COMFORT

The tape should be snug but not tight. You should be able to fit one or two fingers between the tape and your chest - this way you’ll know clothes will be comfy when you’re moving, sitting and layering.

UNDERSTANDING YOUR MEASUREMENT IN UK SIZES

Once you have your chest measurement, finding your size is pretty effortless.

In the UK, most chest sizes are already listed in inches.

42 inch chest = size 42
48 inch chest = size 48

If you’re using centimetres, just divide your measurement by 2.54 to convert it to inches.

Remember to think about the cut of the item too. A slim-fit shirt will sit much closer to your body than a regular or relaxed-fit one, even if the label shows the same chest size.

This sizing especially important in men’s formalwear and suit jackets, where precision is essential.

MEASURING FOR SHIRTS VS SUIT JACKETS

The measuring process is the same for both, but how you use that measurement depends on what you’re shopping for.

Model wears Long Sleeve Oxford Shirt Regular Length

MEASURING FOR MEN’S SHIRTS

For a perfect-fit men’s shirt:

Allow a two-finger gap when measuring
Choose between slim fit, regular fit or relaxed styles depending on preference

A well-fitted shirt should sit neatly without pulling at the buttons or billowing at the sides.

SHOP FORMAL SHIRTS

Model wears Line Blazer in Black with White Shirt

MEASURING FOR SUIT JACKETS

For a sharper fit in suit jackets:

Keep the tape slightly closer to the body
Aim for a clean line across the chest and shoulders

A perfect-fit suit jacket should button up comfortably with no pulling or sagging. The shoulders should sit flat, and the chest should feel secure without restriction.

SHOP SUIT JACKETS

NAVIGATING DIFFERENT CUTS & STYLES

Once you have your measurement in inches, cut comes next. At Jacamo, we offer various fits to suit different body types.

Slim Fit: These clothes sit closer to the body. Even if the chest size matches your measurement, the waist and sleeves will be narrower for a more modern look.

Regular Fit: This is a classic choice that provides more room through the torso and arms. It’s a traditional silhouette that prioritises comfort.

Tailored Fit: This sits between slim and regular, providing a shaped waist while still offering a comfortable chest width.

COMMON MISTAKES TO AVOID

If you rush the process, there are a few common mistakes you might end up making:

Measuring over thick clothing
Pulling the tape too tight or leaving it too loose
Letting the tape drop at the back
Holding your breath or tensing your chest

Taking a few extra seconds to check your position can make all the difference to your final fit.

FINDING THE RIGHT FIT FOR YOUR BUILD

Remember, not all bodies are the same, and chest measurement is only one part of the picture.

If you have a broader chest and shoulders, you may need to size up for structured pieces and adjust elsewhere for balance.

If you prefer a looser fit, opt for regular or classic cuts. For a more tailored look, lean towards slim-fit styles that sit closer to the chest and waist.

Choosing the right fit as well as the right size will really help you get the most from your wardrobe.

READY TO FIND YOUR PERFECT FIT?

You’ve measured your chest, you’ve chosen a cut, and you’re ready to find your new wardrobe - that’s where Jacamo come in.

With clothing in chest sizes 36 to 70, we have the perfect-fit pieces that’ll keep you looking and feeling your best.

SHOP FORMALWEAR

MEN’S CHEST SIZE FAQ’s

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