When choosing a watch, wrist size is one of the most important measurements to get right. Knowing your wrist size helps you select the correct case diameter, lug-to-lug length, and bracelet size before buying a watch.
In this guide, we’ll show you exactly how to measure your wrist for a watch and explain how those measurements translate into proper watch sizing.
Tools You’ll Need
Before you start measuring, you will need a few tools:
- Flexible measuring tape: for a simple wrist circumference measurement.
- Calipers: for measuring the case diameter and thickness of your watch, especially if you’re dealing with unusual or oversized watches.
- Paper strip or string: if you don’t have a measuring tape.
- A ruler: for accuracy.
Measuring Your Wrist
Here’s how to get an accurate wrist measurement:
Using a Measuring Tape
The easiest way to measure your wrist is to use a flexible measuring tape. Wrap the tape around your wrist where you usually wear a watch. Make sure the tape is snug against your skin, but not too tight. Look at where the end of the tape meets the rest of the tape and take a reading. For the most accurate measurement, measure your non-dominant hand.
Without a Tape
If you don’t have a measuring tape, you can use a piece of string or a strip of paper. Wrap it around your wrist and mark where it overlaps. Then use a ruler to measure the length of the string or paper. This method won’t be as accurate as a measuring tape, but it will give you a good estimate.
Measuring the Watch Case
The most important things to check for in a watch size are: the case diameter and the case thickness.
- Case Diameter: Measure the case (excluding the crown) from side to side (usually at 8 o’clock and 2 o’clock) to determine the size. This is the standard measurement that the majority of watch manufacturers reference when they list the size of their watches.
- Case Thickness: Use a caliper to measure the height of the case, not including the crystal. Case thickness is a very important factor in the final wearing comfort of a watch. The most common range is between 8mm and 14mm thick.
Measuring Unusual Watch Cases
Some watch cases don’t follow the traditional round shape. These can fit differently on the wrist due to their unique design. To measure these cases:
- Cushion Cases: Measure across the narrowest part of the case for the base size.
- Rectangular/Tonneau Cases: Measure both the width and length to better understand the overall size.
These cases tend to wear slightly larger than their measurements suggest, so always try them on if possible before buying.
Lug Width and Lug-to-Lug Measurement
Two additional key measurements you should know are lug width and lug-to-lug distance:
- Lug Width: The lug width is the measurement between the inner edges of the lugs (the pieces of metal on the watch to which the strap attaches). This measurement will help you find the right size strap for your watch.
- Lug-to-Lug: The lug-to-lug distance is the measurement from one end of the watch’s lugs to the other. This distance determines the length of the watch across the wrist, which can affect comfort and fit.
Crowns, Pushers & Complications
Watches with crowns, chronograph pushers, or complications (additional features like buttons or valves) can affect the wearability of the watch. For example:
- A 42mm watch with large pushers may feel closer to a 44mm watch, even if the case diameter is smaller.
- Crown Guards can also alter how the watch feels on the wrist. Be sure to account for these extra features when determining the right fit.
Finding Your Ideal Watch Size
Knowing your average wrist size in inches will help you determine the appropriate watch case size for a comfortable fit. Here’s a table showing wrist circumferences and recommended watch sizes:
| Wrist Size (inches) | Recommended Watch Diameter |
| Under 6” | 34–36mm |
| 6”–6.5” | 36–38mm |
| 6.5”–7” | 38–40mm |
| 7”–7.5” | 40–42mm |
| 7.5”+ | 42–46mm+ |
The average wrist size for men is 7-7.5 inches, so a 40-42mm watch would fit most. It’s important to know this, especially if you are planning a surprise gift.
Below is a selection of watches in different case sizes to help you visualize how each size looks. Seeing these examples side by side makes it easier to understand proportions and choose the watch size that best matches your wrist size and personal preference.
Here’s an example of a 37mm watch diameter, shown by the Tudor Black Bay 54 M79000N-0001, which wears very similarly to a traditional 38mm case on the wrist. For additional context, this article also features the Tudor Ranger 36mm, offering a clear visual reference for how even smaller case sizes sit on the wrist.
Shown here is an example of a 41mm case size, represented by the Omega Seamaster Aqua Terra 41mm.
Here’s an example of a 44mm watch diameter featuring the Hublot Big Bang Chronograph.
Tips for Finding the Best Fit
Here are a few tips to help you get a watch that feels just right:
- Measure the lug-to-lug dimension to ensure that the watch will not overhang your wrist.
- Consider the case thickness, as this will determine how the watch feels on the wrist when worn for long periods of time.
- Choose a strap or bracelet that allows you to adjust the fit easily.
Once you know your wrist size, learn how a watch should fit overall in our complete watch fit guide.
Shop the Perfect Fit at Precision Watches
Measuring your wrist accurately is the first step toward choosing a watch that fits properly. If you’d like professional help with sizing or bracelet adjustments, our authorized watch repair service can assist with resizing and fit corrections.
FAQs
What is a normal watch size for men?
The average men’s watch size typically ranges from 38mm to 42mm, depending on wrist size and style preferences.
Is 42mm a big watch?
A 42mm watch diameter falls within a standard size, but looks big when worn on small wrists. Lug-to-lug length is also an important consideration when getting the correct fit.
What mm watch should I get?
If you are unsure about your wrist size, consider a watch that is between 38mm and 42mm in case diameter. This aligns with the average wrist size of 7-7.5 inches.
