How do I find the right watch size?

To choose the right watch size, measure your wrist circumference using a measuring tape. If it shows between 15 and 18 cm, go for watches with a medium case diameter (from 38 to 42 mm). If your wrist measures more than 19 cm, large wristwatches with a case size of 44–46 mm will suit you.

The main rule: if the case diameter is chosen correctly, the watch’s “lugs” (strap attachment points) should not extend beyond the width of your wrist.

How to choose a watch based on wrist size

Three factors influence the size and appearance of a watch: the characteristics of the case and strap, and the presence of additional design elements. These characteristics are discussed in more detail below.

Dial

Diameter

There is a simple formula to help you determine how to choose a watch by size. Multiply the width of your wrist (you can measure it with a tape or a ruler) by 0.618. For example, if your wrist width is 60 mm, the suitable case size would be: 60 * 0.618 = 37 mm.

You can also check if a watch fits in another way. Compare your wrist width to the “lug to lug” measurement. This parameter indicates the distance between the two lugs vertically (from 12 to 6 o’clock). It should be at least 3–5 mm less than your wrist width.

Knowledge of proportions will also help you choose the right watch size. The idea is simple: the thinner the wrist, the smaller the watch should be, and vice versa.

The proper ratio can be illustrated in the following table:

These proportions are applicable to both men's and women's accessories. Nevertheless, men's models with dial diameters below 35 mm are rarely found.

Height

The case height is directly proportional to its diameter. This parameter shows the distance from the top surface of the glass to the bottom of the case back.

1. Case height.
2. Case diameter with crown.
3. Distance between lugs.

When mechanical watches were handcrafted, a thin case was a watchmaker’s pride and a mark of skill. Today, this feature has lost its importance — comfort is much more significant when choosing an accessory.

Most often, watches with a 38–42 mm diameter have a case height of 6–7 mm. Bulkier watches typically have a height of around 9 mm. If the crystal is domed, height is measured from the highest point.

The appropriate watch size depends on the shape of the wrist. Thin models look better on rounded wrists. For wide and flat wrists, larger and taller watches are more suitable.

Strap/Bracelet

Length

To choose the right watch, it is important to determine the correct strap length. It is usually indicated by two numbers separated by a slash, for example, 130/80. The first number represents the length of the longer part of the strap, and the second — the shorter part. Which watch size to choose depending on wrist circumference is better illustrated in the following table.

Measure your wrist circumference with a measuring tape at the spot where you plan to wear the watch. This is usually the narrowest part of the wrist between the protruding bone and the hand. There should be a small gap — about half a finger — between the tape and your skin to ensure the watch feels comfortable. Handmade straps are usually thicker, around 4 mm, and should be one size longer for a comfortable fit.

When buying a watch, consider what you'll wear it with. Sometimes, cuffs or sleeves that are too tight can make reading the time difficult. If the bracelet length is too long, it can be adjusted — or you can try adjusting it yourself.

Properly fitted watches with leather, suede, or other straps should sit snugly on the wrist and should not be able to rotate. At the same time, they shouldn’t leave red marks on your skin. Watches with metal bracelets sit less tightly — they can rotate slightly around the wrist. However, a bracelet should not slide freely on your wrist, or you may have to search for your watch under your sleeve when checking the time.

Width

Just like length, strap width is indicated using two numbers, for example, 24*22 mm. The first number refers to the strap width near the case, and the second — near the clasp. Strap width is typically written on the inside of the strap, in the manual, or in the technical specifications on the DEKA STORE website.

Sometimes, instead of this value, manufacturers list the lug width — the distance between the strap’s attachment points horizontally (from 9 to 3 o’clock). This metric can also be used to determine the appropriate bracelet width.

1. Strap width at the attachment point.
2. Strap width at the clasp.
3. Length of the shorter strap part.
4. Length of the longer strap part.

Top watch brands usually follow a simple rule: the strap width should be half the case diameter.

For example, a watch with a 36 mm case should ideally have an 18 mm strap. However, some designer models may have a narrow strap and a large dial, or the opposite.

It is also important to pay attention to the strap material. Here are some simple rules on how to choose the right watch based on wrist size:

• Leather or fabric straps are considered universal — they fit well on both slim and wider wrists.
• Watches with bracelets made of large links look more massive and are suitable for broader wrists; on a slim wrist, they will only emphasize thinness.
• Woven metal bracelets and models with small links look good on both rounded and slim wrists.
• If you have thin wrists but prefer a metal bracelet, choose models where the bracelet width is 2.5 to 3 times smaller than the case.

The visual bulk of the strap is also affected by the material. This is why a metal bracelet of the same width as a leather strap may appear bulkier — and vice versa.

Rubber and silicone models have a neutral appearance and are similar in bulk to leather straps.

Additional Design Elements

The size of a watch is also affected by design details: the appearance of hour markers, the presence of additional counters, windows, or a chronograph, and the size of the hands. For example, if a watch is already large, added design elements can make the accessory look even bigger visually.

Here’s another tip that will help you choose the right wristwatch: protrusions and decorative elements should not hang over the edge of your wrist. Otherwise, wearing the watch every day will simply be uncomfortable.

How to Choose the Right Watch Size

In addition to all the above, there are a few more simple recommendations to help you choose the right watch. Here are four key tips:

1. Pay attention to your height. The shorter a person is, the more compact their wristwatch should be. Conversely, taller people are better suited to larger accessories.
2. Consider the case shape. A square or rectangular dial looks bulkier than a round one. For example, a 37 mm square case is visually comparable to a 42 mm round dial.
3. A large case and wide strap always look luxurious and high-end, but such watches definitely don’t suit people with small wrists. It may look like the watch belongs to someone else. Similarly, small delicate watches may look lost or even awkward on larger wrists.
4. Wrist size doesn’t always match hand size. Some people have large hands but relatively slim wrists. If that’s your case, watches with a medium dial and strap width will look the most balanced.

All the listed recommendations are mainly relevant for classic accessories. If you prefer vintage, fashion, or sports models, rely primarily on your own preferences and feelings. That way, your watch will become a worthy accessory that brings you joy every day.