How do you know if a shirt is the right size?

Looking for a shirt that fits just right, without unsightly wrinkles or feeling constricted? Knowing whether a shirt is the right size makes all the difference to your appearance and comfort. Whether for the office, an evening out, or everyday wear, a good fit flatters your figure while allowing you to move freely. Discover the best shirts in 2026. 

To refine your choice of fabric and style, it's essential to explore collections tailored to your everyday needs. For example, you can check out the best men's shirts to quickly find the most versatile styles.

Depending on your style, choose men's checked shirts for an authentic casual look, men's casual shirts for everyday comfort, or men's cotton shirts for breathability and softness. Finally, men's work shirts are ideal for combining durability with professional elegance.

Why is a good shirt fit essential?

An shirt that doesn't fit well can ruin an entire outfit. If it's too tight, it pulls at the buttons and restricts your movements. If it's too loose, it bunches up and looks sloppy. According to recent studies on French body shapes (IFTH's 2025 National Measurement Campaign, CNM), bodies are changing: men have grown by an average of about 3 cm in height and 2 cm in waist circumference since the 2000s. These changes explain why many standard shirts no longer fit as well as they used to.

A perfect fit improves not only comfort but also confidence. You can move freely, and your outfit stays impeccable all day. We see this regularly with our customers: a well-chosen shirt transforms your overall look.

How to take your measurements before buying?

The basics are simple: measure your body with a tape measure. Ask someone for help if possible to get more accurate measurements.

• Neck : Place the tape around your neck, below your Adam’s apple, leaving room for one finger. This is the key measurement for formal shirts.
• Chest : Measure around the fullest part, under the armpits.
• Waist : At the navel.
• Shoulders : From one shoulder bone to the other.
• Sleeve length : From the center of the back (nape) to the wrist, with the arm slightly bent.

Compare these figures with the manufacturer’s size charts. Many brands, including ours, offer detailed guides online.

Here’s an example of an approximate conversion chart for men (based on recent standards):

These measurements vary slightly depending on the fit (slim, classic). Always check the specific size guide.

Key points for checking a shirt’s fit

Put on the shirt and button it up. Look at yourself in a mirror from different angles while moving.

1. Collar

You should be able to easily slip two fingers between the collar and your neck. If it’s too tight, it leaves marks on your skin and makes it hard to breathe. If it’s too loose, it gaps and looks loose. This detail makes a big difference to everyday comfort.

2. Shoulders

The shoulder seam should sit exactly at your shoulder bone. If it falls onto your arm, the shirt is too big. If it sits up toward your neck, it’s too small. The shoulders form the shirt’s "hanger": everything else depends on them.

3. Chest and torso

Pinch about 2 to 5 cm of fabric on each side under your armpits. The shirt should follow your shape without pulling at the buttons (no "X" effect between the buttons). When you raise your arms, you shouldn’t feel excessive tension.

4. Sleeves and cuffs

The sleeves should follow your arms without hanging loose or feeling tight. With your arm relaxed, the cuff should reach about 2 cm above the base of your thumb. With a jacket, a little cuff should show. The cuff buttons should fasten without forcing them.

5. Length

For a shirt to be tucked into your pants, it should cover your buttocks and stay in place when you raise your arms. If it’s too short, it will keep coming untucked. If it’s too long, it will bunch up.

Try sitting down and moving around: everything should remain comfortable and in place.

We often recommend choosing a size based on the shoulders, then adjusting the rest if needed (a tailor can make alterations).

Different fits and their features

• Slim fit : Fits close to the body. Ideal for slim builds, but check the comfort around the shoulders and chest.
• Classic fit (regular) : More room, comfortable for most body types.
• Loose fit : For a casual style or larger body shapes.

According to recent data, many men opt for a balance between fit and comfort due to changes in waist measurements.

Additional tips for making the right choice

• Always try the shirt on with the clothes you’ll wear with it (trousers, jacket).
• Check the back: there should be no horizontal folds across the shoulders or back.
• Consider the fabric: cotton stretches slightly after washing.
• For larger sizes or specific body shapes, custom options can prevent many disappointments.

Signs of a poor fit

This table summarizes the essential checks.

Choosing the right shirt size takes a little attention, but the results are worth it: a polished silhouette and optimal comfort. By following these steps (taking measurements, checking key points, and testing your range of motion), you can avoid common mistakes and feel more confident.

We focus on well-tailored pieces that suit real body shapes.

Ready to find your perfect shirt? Discover our shirt collection or contact us for personalized advice. Try our service and enjoy free delivery on orders over €149.

Best Shirts in 2026

Zed By - Best Shirts in 2026

Mandarin Collar Shirt Black

This shirt is made from 100% cotton, offering comfort, softness, and breathability. Easy to care for, it can be machine-washed at 30° while retaining its quality and color.

Its tailored fit flatters the silhouette, while its mandarin collar adds a modern, elegant touch. The button closure makes it easy to put on while ensuring a polished look.

In black, this shirt is versatile and suitable for any occasion, whether formal or casual, for a chic, timeless look.

White Honeycomb Formal Shirt

This shirt is made from 80% cotton and 20% polyester, offering comfort, softness, and easy care. It can be machine-washed at 30° while retaining its quality and vibrant color.

Its tailored fit elegantly flatters the silhouette, while its small collar adds a subtle, modern touch. The button closure makes it easy to put on while maintaining a polished look.

White in color, this shirt is versatile and suits every occasion, formal or casual, for a look that's both classic and refined.

Sky Blue Linen Band Collar Shirt Blue

Made from a natural blend of 70% linen and 30% cotton, this piece combines lightness, breathability, and comfort. Linen adds an authentic texture and keeps you feeling cool, while cotton softens the fabric and improves its overall drape.

Its fitted cut creates a modern, structured silhouette, ideal for an elegant look while remaining comfortable for everyday wear.

It features a band collar, adding a minimalist, contemporary touch, as well as a button fastening that reinforces its clean style.

The style stands out for its sky-blue shade, both bright and understated, easy to pair and suitable for different occasions.

For care, machine washing at 30° is recommended to preserve the quality of the natural fibers and keep the colors vibrant.

Discover also: 

WEDDING SHIRTS

BAND COLLAR SHIRTS

TAB COLLAR SHIRTS

ITALIAN COLLAR SHIRTS

SPREAD COLLAR SHIRTS

CASUAL SHIRTS

FAQ

How do you measure your neck correctly for a shirt?

Place the measuring tape around your neck, just below your Adam's apple, leaving enough room for one finger. Round up to the nearest half-centimeter. This measurement guides your choice of main size.

What's the difference between a slim fit and a classic fit?

The slim fit follows the body more closely for a modern, streamlined look. The classic fit offers more room and comfort, making it suitable for extended wear or different body types.

Can an oversized shirt be altered?

Yes, a good tailor can alter the sides, sleeves, or length. The shoulders, however, are difficult to alter, which is why it's important to check them first.

How can you tell if the sleeves are the right length?

With your arms by your sides, the sleeve should end around the base of your thumb. With a jacket, about 1 cm of cuff should ideally show. Test it by moving your arms.

Should fabric be taken into account when choosing a size?

Absolutely. Stretch fabrics allow for a closer fit. Pure cotton may shrink slightly in the wash: follow the care instructions.

Can a shirt be perfect without trying it on?

This is possible with precise measurements and a reliable size guide, especially for made-to-measure styles. However, trying it on is still the best final check.

Discover the Best Shirts in 2026 - Zed By