There is a small style decision that can change the whole impression of an outfit: whether you fasten that top button. Leave it open, and the collar frames your face, your neck appears a little longer, and the outfit feels more relaxed. Button it up, and suddenly you may look ready for a board meeting—or a very serious family photograph.

That open-collar effect is especially useful if you want to look taller and more confident without making your clothes feel like a costume. It is not a magic trick, and it will not add inches to your actual height. But when you get the fit and proportions right, an unbuttoned collar can create a clean vertical line that helps your silhouette look longer. Here is how to make it work with the clothes you already enjoy wearing.

Why an open collar can make you look taller

Your eye follows lines. A shirt buttoned to the neck creates a horizontal stop just beneath the face. Opening the top button—or sometimes two—lets the collar form a narrow V. That V draws attention downward through the center of the body, creating a subtle vertical effect.

The difference is small, but good style is often a collection of small differences. A well-fitted shirt, a simple color palette, and an open collar can work together to make your frame look more balanced. The goal is not to expose as much skin as possible. It is to create a neat, uninterrupted line from your face toward your torso.

I learned this on a warm evening in Florence, where I was wearing a linen shirt that seemed to have been designed for a man twice my size. I had left three buttons open, thinking I looked effortlessly relaxed. My friend Luca took one glance and said, “Mario, you are going to dinner, not sailing away.” He was right. One open button gave me the easy, elongated look I wanted. Three gave me a collar with its own travel plans.

Find the right number of open buttons

For most casual outfits, opening the top button is enough. It creates a little breathing room around the neck and a modest V without making the shirt look unfinished. If you are wearing a lightweight shirt in warm weather, opening two buttons can feel comfortable and look natural, especially with a relaxed collar.

Use the setting as your guide. For a smart-casual dinner, an open top button usually looks polished. For a beach lunch, two open buttons can suit the mood. In a conservative office or formal event, keep the opening discreet and make sure your collar sits neatly under a jacket.

A useful test: look in the mirror while standing naturally, not with your chin lifted like a portrait in a palace. If the opening shows more chest than you intended, button it up one step. The right amount should make you look at ease, not distracted by your own shirt.

Choose a collar that holds its shape

Not every collar behaves well when it is unbuttoned. A soft button-down collar is an easy choice for casual outfits because its points stay in place. A spread collar can look sharp with a blazer, while a small, narrow collar may feel cramped if the shirt opening is too tight.

Check that the collar points lie flat rather than curling upward or flaring away from your chest. If you wear a jacket, the collar should sit neatly beneath the lapels. Collar stays can help keep dress-shirt points crisp, but they should not make a soft, relaxed shirt look rigid. Think of the collar as a frame: it should support your face, not compete with it.

The collar also needs to suit your neck and face. A very wide spread can make the neck look shorter, while a collar that is too small may seem out of proportion. Try a few styles and take a quick photo at eye level. Mirrors are helpful; photos are less forgiving, which is precisely why they are helpful.

Get the shirt fit right first

An open collar cannot rescue a shirt that is pulling at the chest or hanging like a curtain. For a taller, more confident impression, look for a fit that follows your shape without clinging. The shoulder seams should sit close to the ends of your shoulders, the sleeves should not swallow your hands, and the fabric should fall smoothly from chest to waist.

Pay particular attention to the length. A shirt that is too long can shorten the appearance of your legs, especially when worn untucked. A shirt that is too short may ride up whenever you move. If you wear it untucked, the hem should generally finish around the middle of your fly, depending on the cut and your proportions. If it is designed to be tucked in, tuck it in neatly rather than letting extra fabric bunch at the waist.

When the shirt is tucked, a slim belt in a similar shade to your trousers avoids an abrupt horizontal break. When it is untucked, keep the hem clean and avoid bulky pockets or oversized patterns that draw the eye outward. A simple, close-to-the-body fit makes the open collar’s vertical line easier to notice.

Use color and pattern to keep the line clear

Solid colors are the easiest way to make an open collar look intentional. A white, pale blue, olive, or navy shirt works with a wide range of trousers and jackets. If you want a pattern, choose one that does not overwhelm your frame: fine stripes, small checks, or subtle prints tend to be easier to style than large, high-contrast designs.

Vertical stripes can reinforce the sense of length, but they are not compulsory. A well-fitted solid shirt may look taller and more polished than a striped one that bunches at the waist. Keep the outfit’s colors reasonably connected, too. A shirt and trousers in related shades create a smoother visual path than a sharp contrast that cuts the body into obvious blocks.

For example, try a pale blue shirt with navy trousers and brown shoes. Leave the top button open, add a simple belt, and keep the shirt tucked neatly. The colors flow without looking dull, and the collar adds an easy focal point near the face. If the day calls for something more relaxed, swap the trousers for dark, straight-leg jeans and leave the shirt untucked—provided its cut is made for it.

Layer without hiding the effect

An open collar works beautifully beneath a blazer, an unstructured jacket, or a light cardigan. The layer adds shape to the shoulders, while the small V at the neck keeps the outfit from feeling closed in. Choose a jacket that fits well through the shoulders and does not overwhelm your frame. Too much fabric can make a shorter man look as though he has borrowed his older brother’s wardrobe—and not in a charming way.

For a clean look, let the collar sit inside the jacket rather than spreading over the lapels. With a casual overshirt, you can wear the shirt underneath with its top button open, but avoid stacking several loose collars at once. One clear frame around the neck is enough.

If you wear a T-shirt beneath your shirt, make sure it stays hidden. A visible crew neck can interrupt the V and make the opening look crowded. A low-profile undershirt is the more discreet option. And when temperatures rise, a shirt worn on its own can do the job perfectly—no extra layers required.

Pay attention to grooming and accessories

An open collar puts more focus on your face and neck, so small details matter. A clean neckline, tidy facial hair, and a shirt without a rumpled collar help the whole look feel deliberate. You do not need to spend an hour preparing. Just make sure your clothes look like you chose them, rather than found them in a hurry on the floor.

Accessories should be restrained. A fine chain can work with a casual shirt, but a heavy necklace may crowd the opening. A pocket square can add personality to a blazer, although it should not compete with a loud shirt pattern. Keep the attention where it belongs: on your face, the collar, and the confident way you carry yourself.

Posture makes a difference, too. Stand comfortably tall, relax your shoulders, and let your chin sit level. No collar can compensate for a hunched posture, just as the finest Italian shoes cannot persuade you to walk like a man avoiding a puddle. Good clothes look best when you move naturally in them.

Pair the open collar with the right shoes

Your shoes influence the proportions of the whole outfit. A streamlined pair of dress shoes or clean, low-profile sneakers can keep the look balanced. Avoid shoes so bulky that they draw all the attention to your feet, particularly if your trousers are narrow. The aim is a connected silhouette from collar to hem, not a competition between your shoes and your shirt.

If you want a genuine boost in height, elevator shoes can add discreet lift while keeping the outside of the shoe looking much like a regular dress shoe or sneaker. Choose a style that suits the occasion and fits comfortably. The confidence comes from knowing the shoes work with your outfit, not from spending the evening wondering whether your feet are plotting against you.

Keep trouser hems neat. A long break, where excess fabric piles over the shoe, can make the legs look shorter. A cleaner hem creates a more streamlined finish and complements the vertical effect of an open collar. These details work together: collar, fit, trousers, and shoes all help guide the eye through the outfit.

Common open-collar mistakes to avoid

• Opening too many buttons for the setting. A relaxed look is not the same as an accidental deep neckline.

• Wearing a collar that curls, collapses, or sticks out beneath a jacket. Choose a collar that stays neat when open.

• Leaving an undershirt visible unless it is an intentional part of the outfit.

• Choosing an oversized shirt in the hope that extra fabric will feel more comfortable. A clean fit usually looks more confident.

• Pairing a very busy shirt with several bold accessories. Too many focal points make the outfit feel scattered.

• Forgetting the occasion. The same two-button opening that feels right at a summer café may look out of place at a formal meeting.

Three easy outfits to try

Casual weekend: Wear a fitted linen or cotton shirt in a light neutral shade with dark, straight-leg jeans. Leave the top button open, roll the sleeves once or twice, and add simple sneakers or casual leather shoes. Keep the shirt untucked only if the hem is made for that purpose.

Smart-casual evening: Pair a pale blue or white shirt with tailored navy trousers and a lightweight blazer. Leave one button open and make sure the collar sits smoothly beneath the lapels. Finish with a slim belt and polished shoes. It is relaxed, but no one will mistake it for an outfit assembled during a fire drill.

Warm-weather dinner: Choose a breathable shirt in a soft color, such as olive, sand, or sky blue. Open one or two buttons, depending on the collar and the venue, and wear it with well-fitted chinos. Keep accessories simple and choose shoes that feel comfortable enough for a walk after dinner. A good outfit should be ready for dessert and a little wandering.

Wear the look with ease

The best open collar is the one that feels natural on you. Start with one unfastened button, check the fit, and consider the setting. Add a second only if it suits the shirt and the occasion. Then build the rest of the outfit around clean lines, balanced colors, and shoes that complement your proportions.

Looking taller is not about disguising who you are. It is about using fit, shape, and posture to present yourself with intention. An open collar can help create that easy vertical line, but the real finishing touch is feeling comfortable in your clothes. Button it, unbutton it, take a step back from the mirror—and then go enjoy your evening. That is a confident look at any height.