Turn over the label inside a suit jacket and you see “50R.” Two characters, yet they hold both the wearer's chest and a reference height. To read a European men's suit size, you need only two rules: the number is half the chest circumference in cm, and the letter is the length code. Know these two things and any size chart becomes easy to read.
Quick Answer
A European suit size is half the chest circumference (cm): size 48 corresponds to a chest of about 96 cm, size 50 to about 100 cm. The letters R, S, L give the jacket length by height (R: regular, S: short, L: long). A quick conversion: the European size minus 10 gives the US/UK size; 46 is S, 48 is M, 50 is L, 52 is XL, 54 is XXL.
How to Read the Number on a Suit Jacket Label
Take the label 50R as an example:
- 50 is the European size. Double it to get 100: the wearer's chest is about 100 cm.
- R is regular, a medium jacket length, suitable for someone about 1.70 m to 1.80 m tall.
Europe uses half the chest because a suit jacket is built around the chest and shoulders. These are the two points that decide whether a jacket fits, and the two hardest to alter.
When buying an imported suit, the label often reads something like “40R.” That is the US size: add 10 to get the European size, so 40R is 50R. The reverse is just as simple: subtract 10 from the European size.
Length Codes S, R, L
| Code | Meaning | Reference height | Difference from R |
|---|---|---|---|
| S (Short) | Short jacket | About 1.63 – 1.70 m | Body and sleeves about 2 cm shorter |
| R (Regular) | Regular jacket | About 1.70 – 1.80 m | Standard |
| L (Long) | Long jacket | About 1.80 – 1.90 m | Body and sleeves about 2 cm longer |
Many ready-to-wear makers in Vietnam drop this code and label only letter sizes or number sizes. In that case you need to ask yourself: how long is this jacket for my height?
Conversion Chart for European Men's Suit Sizes 44–58
| EU size | Letter size | US – UK | Chest | Closest Asian size |
|---|---|---|---|---|
| 44 | XS | 34 | 88 cm | S or M |
| 46 | S | 36 | 92 cm | M |
| 48 | M | 38 | 96 cm | L |
| 50 | L | 40 | 100 cm | XL |
| 52 | XL | 42 | 104 cm | XXL |
| 54 | XXL | 44 | 108 cm | 3XL |
| 56 | 3XL | 46 | 112 cm | 4XL |
| 58 | 4XL | 48 | 116 cm | 5XL |
The “Asian size” column is for reference only, because every brand cuts differently. The general rule: Asian brands cut one to two sizes smaller and shorter than European ones, so if you wear a European 50, you usually need XL or XXL when buying Asian sizes. To look up sizes by weight and height, see the men's suit size chart by height and weight.
How to Measure Yourself for an EU Size
You will need a soft tape measure and a helper:
- Wear a thin shirt, stand straight, arms hanging naturally.
- Measure your chest at the fullest point, with the tape running under the arms and flat across the back. The tape should be snug, not tight.
- Halve it. For example, a 98 cm chest gives 49: you fall between 48 and 50.
- Measure the shoulders: from one shoulder point to the other, across the back. The shoulders decide whether you choose 48 or 50 when you fall between two sizes.
- Compare with your height to choose the S, R or L code.
When you fall between two sizes, choose by the shoulders, then have the tailor take in the body. A jacket with shoulders too wide hangs loose; too tight, it creases across the chest; the body of the jacket is far easier to adjust.
Example: Three Men, Three Ways of Reading Size
- Mr. A, chest 94 cm, 1.66 m tall. Half the chest is 47, between 46 and 48. With his modest height, he should look for the S code. He tries 46S and 48S, chooses by the shoulders, then has the body taken in.
- Mr. B, chest 102 cm, 1.84 m tall. Half the chest is 51, between 50 and 52. Taller than 1.80 m, he should look for the L code. If a brand only has R, the sleeves will be short and he should consider made-to-measure.
- Mr. C, chest 110 cm, 1.74 m tall. Half the chest is 55, between 54 and 56. With average height, he takes code R. With a larger chest, he should pay particular attention to the trousers, since trouser size does not usually follow jacket size.
All three follow the same method: measure the chest, halve it, look at the height, then let the shoulders decide. Once you have that process, you don't need to memorize any chart.
The Difference Between Jacket and Trousers (Drop)
A ready-to-wear suit usually has a “drop 6”: the trouser waist is about 12 cm smaller than the jacket chest. If you carry a belly, your waist will exceed this drop, so the jacket and trousers need two different sizes. This is why many places let you choose jacket and trouser sizes separately, or exchange the trousers after purchase. A made-to-measure suit doesn't have this problem because each measurement is taken separately.
Record Your Size So You Don't Have to Guess Next Time
You can save four lines in your phone's notes: chest circumference (cm), shoulder width (cm), length code (S, R or L), and the EU size you currently wear comfortably. Next time you buy a ready-to-wear jacket or receive a size chart from any store, just open the note and compare instead of trying on every piece. Remember to update it whenever your weight changes noticeably, because chest and waist are the two measurements that change fastest.
Common Mistakes
- Buying by letter size without measuring. One brand's M can be another brand's L.
- Measuring the chest over a thick garment. The number will be a few centimeters larger than the truth.
- Forgetting the length code. Tall men in an R jacket often get short sleeves; short men in an R often get a jacket that is too long.
- Confusing suit size with shirt size. Shirts are measured by neck and sleeve, suits by chest and shoulders; the two systems can't be cross-converted.
Tip from a Mon Amie master tailor: when trying on a ready-to-wear jacket, fasten the button and reach both arms forward. If the back of the jacket looks so taut that the seams seem about to burst, you need to go up a size, even if the chest still looks “fine.”
Frequently Asked Questions
What are numeric men's suit sizes?
It is the European numbering system, half the chest circumference in cm: 46, 48, 50, 52, 54... Size 50 means a chest of about 100 cm.
Is suit size the same as T-shirt size?
No. T-shirt size is a letter size reflecting the width of the body, while suit size follows the chest and shoulders, paired with a length code. The same M on both garments can differ by up to a size.
Is a suit size chart in cm accurate?
Charts are only a reference, because every maker cuts differently. The most reliable method is to compare your measurements with the product's actual measurement chart: chest, shoulder, body length and sleeve length, in cm.
Size 48 or 50 with a 98 cm chest?
Choose by the shoulders. If your shoulder is close to 46 cm, choose 48 and ask for a slight let-out; if it is close to 47–48 cm, choose 50 and have the body taken in. Try both and let the mirror decide.
How do I avoid guessing my size?
Made-to-measure. With made-to-measure, you don't need to convert anything: the tailor takes your chest, shoulder, back, sleeve and more than 30 other measurements, then builds the pattern to your exact body. The article choosing a men's suit size when you are between two sizes has more tips for this common situation.
Final Thoughts
Understanding how to read a European men's suit size spares you confusion before any size chart. If you want to skip every conversion and have a jacket that fits from the start, explore online made-to-measure or book a fitting at a showroom.