Apple Watch Band Size Explained: 4 Steps to a Perfect Fit

What to Know

  • For the perfect fit, you need to know your Apple Watch size, model, and your wrist circumference.
  • To learn your Apple Watch size, check the back of your watch or the model info in your iPhone Settings. 
  • To get your wrist size, use Apple's sizing guide to print a paper band to find your best fit.

Each Apple Watch, except the Ultra, comes with a simple Sport Band, which can be made to fit any wrist size. However, the world of Apple Watch bands is as diverse as the people who wear them, and if you're looking for a Solo Loop or another band that's not adjustable, you'll need to know how to use the Apple Watch band size chart and other metrics to find the right fit.

Jump To:

How to Order the Perfect Apple Watch Band Size


The Apple Watch size is the size of the device itself, without the band.

Apple Watch band sizes coordinate with the size of each device to ensure a comfortable fit and proper wear. When buying a new Apple Watch band, it's crucial to choose one that fits the size of your watch. Luckily, the same band will fit every Apple Watch model as long as it's the same device size. The following five steps will ensure that your future band will fit your Apple Watch model and wrist perfectly.

Step 1: Which Apple Watch Do I Have?

"What size is my Apple Watch," is a common question. The quickest way to find out which Apple Watch size you have is to remove the watch from your wrist and look at the engraving on the back.

iPhone Life
Discover your iPhone's hidden features
Get a daily tip (with screenshots and clear instructions) so you can master your iPhone in just one minute a day.
See the engraved back of your watch for the model.

You can also check the model in the settings on your iPhone. If you'd like to know more about the different Apple Watch models and their many distinguishing features, we can help with that. If you are shopping around for a new model, check out which Apple Watch you should buy!

Related: How to Change Your Watch Band

Step 2: Which Band Fits My Apple Watch?

The smaller Apple Watch will be 38–42 mm, depending on the model. The larger Apple Watch will be 44 mm–49 mm, depending on the model. The difference in millimeters is in the display rather than the watch. That means that an Apple Watch band that fits a 38 mm Series 3 Apple Watch will also fit the 40 mm Series 6 Apple Watch. Likewise, a band that fits a 44 mm Series 5 will fit a 42 mm Series 2. The 44 mm, 45 mm, and 49 mm Apple Watch bands will fit the new large Apple Watch Ultra and Apple Watch Ultra 2.

Which Band Fits My Apple Watch?

Step 3: How to Measure Wrist Size for an Apple Watch Band

Now that you understand how to measure Apple Watch band size, you need to learn how to measure wrist size. The safest thing to do for the best results is to use the Apple Watch band size chart. This official guide lets you cut out a paper band to help you get the perfect fit, and it really works.

It can be easy to simply estimate Apple Watch band sizes when it comes to the Sport Band and Sport Loop because the options are S/M for shorter bands or M/L for longer bands, and they're adjustable. However, not all bands are. The Solo Loop, for example, does have some stretch to it, but it's not possible to adjust it. 

If you don’t have a printer and you want to measure your wrist in a pinch, cut a strip of paper or a string. Use a pen to mark the size of your wrist on the paper or string, then measure it with a ruler. You can then input the measurements on Apple’s website by clicking the Start your measurement button to get the correct size.

Pro Tip

Even if you aren’t going to buy your band on Apple’s website, you can use its sizing tools to figure out what size to get. Just pretend you're shopping for an Apple Watch and follow the steps.

Return to Top

Using a Hand Measurement App

If you have a measuring tape or a ruler, skip to step 4. If you don't have a printer or a ruler, you can always use a hand measurement app to help you measure your wrist. Keep in mind that this is not the most accurate measurement and may result in an ill-fitting band.

  1. Open the Measure app (It's a free stock app that comes with your iPhone).

    Open Measure app on your iPhone - apple watch size chart
  2. Follow the on-screen directions until the white semicircles appear in bold, indicating that you are ready to measure.

    Follow the on screen directions until the white semi circles appear in bold.
  3. Position the spot in the middle of the white semicircles at the starting point of your measurement and tap the plus button

    Position the point in the middle of the white semi circles on the starting point of your measurement.
  4. Move the spot in the middle of the semicircles to the ending point of your measurement and tap the plus button.

    Move the point in the middle of the semicircles to the ending point of your measurement.
  5. Tap the measurement to see it in centimeters.

    Tap the measurement to see it in centimeters.

To test the accuracy of the measurement, I used a ruler. The Measurement app was 3mm (0.1) off. Depending on the type of band you are considering buying, this could be a small enough margin of error to be just fine. However, if you are considering a Solo Loop, I strongly recommend waiting until you can use a printer and taking advantage of Apple’s official measuring guide tool. Apple's printed guide offers an Apple Watch size comparison on wrists for a powerful visual reference.

Return to Top

Step 4: Understanding Different Band Sizes

Apple sells some great Apple Watch bands for women and men on their website and in their stores. These are size options for official Apple Watch bands:

  • Apple Watch Sport Band: S/M (shorter) and M/L (longer) are available for each watch size. These are adjustable Apple Watch bands, they have notches like a belt.
  • Apple Watch Sport Loop Band: One size band for each watch size. The Velcro allows for custom adjustments. 
  • Apple Watch Solo Loop Band: Comes in 12 sizes for each watch size. They are not adjustable, so make sure to use Apple’s sizing guide.
  • Apple Watch Braided Solo Loop Band: Comes in 12 sizes for each watch size. They are not adjustable, so make sure to use Apple’s sizing guide.
  • Apple Watch Leather Bands: One size band for each watch size. Bands are adjustable like a belt with notches.
  • Apple Watch Milanese Loop Band: One size band for each watch size. The magnet allows for custom adjustments.  
  • Apple Watch Silver Link Bracelet: One size band for each watch size. Links can be removed or added to achieve the perfect fit.
  • Apple Watch Alpine Loop Band: Three size bands for the 49 mm Apple Watch Ultra (will also fit 44 & 45 mm Apple Watch models). A G-hoot slides in and out of loops.
  • Apple Watch Trail Loop Band: Two size bands for larger size models. Has a pull tab that allows for custom adjustments.
  • Apple Watch Ocean Band: One size band for larger size models. The corrosion-resistant band can be adjusted like a belt with notches. The Ocean band is one of the best Apple Watch bands for men and women who scuba dive because you can buy an extension to fit over the thickest wetsuit.

These are the best new Apple Watch bands that were released alongside Apple Watch 9 and Apple Watch Ultra 2:

  • Apple Watch FineWoven Band with Magnet: One size band for each watch size. Comes with either a magnet for custom adjustments.
  • Apple Watch FineWoven Band with Modern Buckle: Three size bands with three different lengths (S/M/L) and the Modern Buckle has notches like a belt.

Although you can’t beat the quality of original Apple Watch bands, you can also shop on Etsy or Amazon for more unique designs at affordable prices. There are also options to get custom Apple Watch bands. These might have different sizing guides, as Apple does not make or endorse them.

Return to Top

Step 5: Buying the Correct Size on

Buying your Apple Watch band on Apple’s website is a great way to ensure you're getting top quality. Plus, if you get the wrong size, you will be able to exchange it for a better fit.

  1. Select the band you want to purchase. For this example, I will use the (PRODUCT)RED Solo Loop.

    Select the band you want to purchase - iwatch band size chart
  2. Pick your color and case size. Remember that the 40 mm will fit a 38 mm watch and the 44 mm will fit a 42 mm watch. 

    Pick your color and case size.
  3. Select Start your measurement.

    Select Start your measurement.
  4. If you don’t already know your wrist size, download the printable tool and follow the provided instructions. There is a video guide that can help you. If you already measured your wrist with a ruler, tap Everyday items.

    If you already measured your wrist with a ruler, tap Everyday items.
  5. Tap Got it. What’s next?

    Tap Got it. What’s next?
  6. Enter your measurements in inches or centimeters. Tap Get your band size.

    Tap Get your band size.
  7. From here, you can proceed with the on-screen directions to make your purchase!

    proceed with the on-screen directions to make your purchase!

Return to Top

Apple Watch Model Sizes, Official Bands & Quick Metric vs. Imperial Conversions

Knowing the measurements of your wrist and Apple Watch  isn't always enough to get the perfect fit. Some Apple Watch bands have confusing measurements or awkward closures so even if you measure everything correctly, you may end up with the wrong fit because your wrist size falls right in between two notches or loops. If your watch doesn't fit correctly, your heart rate and calorie burning stats will not be correct. However, there are some bands that can be adjusted just right.

Apple Watch Model Sizes

The following is Apple Watch size guide, showing the Apple Watch band measurements by watch model:

  • Apple Watch Series 1: 38 mm and 42 mm
  • Apple Watch Series 2: 38 mm and 42 mm
  • Apple Watch Series 3: 38 mm and 42 mm
  • Apple Watch Series 4: 40 mm and 44 mm
  • Apple Watch Series 5: 40 mm and 44 mm
  • Apple Watch Series 6: 40 mm and 44 mm
  • Apple Watch Series 7: 41 mm and 45 mm
  • Apple Watch Series 8: 41 mm and 45 mm
  • Apple Watch Series 9: 41 mm and 45 mm
  • Apple Watch Ultra: 49 mm
  • Apple Watch Ultra 2: 49 mm
  • Apple Watch SE (Gen 1 & 2): 40 mm and 44 mm

What is the difference between 38 and 49 mm Apple Watch sizes? This refers to the size of the height of the Apple Watch display. Keep in mind that larger Apple Watches have longer band options, and smaller watches will offer shorter band options. The Sport Loop band for the 40 mm watch can fit 130–200 mm wrists, while the band for the 44 mm watch can fit 140–220 mm wrists. You can get the perfect fit if you just follow this Apple Watch band size guide.

Quick Metric vs. Imperial Conversions for Apple Watch Sizing

These can come in handy when measuring your wrist circumference in order to calculate your Apple Watch band size.

Apple Watch Sizes: Apple Watch sizes refer to the length from the top of the device to the bottom, not from one side to the other.

  • 38 mm is 1.49 inches
  • 40 mm is 1.57 inches
  • 41 mm is 1.61 inches
  • 42 mm is 1.65 inches
  • 44 mm is 1.73 inches
  • 45 mm is 1.77 inches
  • 49 mm is 1.93 inches

Apple Watch Band Lengths: These lengths can be added to the Apple Watch size to approximately equal the circumference of your wrist, give or take a few millimeters. We recommend using Apple's watch band size chart for the best fit, but these measurements can still come in handy.

  • 130 mm is 5.12 inches
  • 140 mm is 5.51 inches
  • 200 mm is 7.87 inches
  • 220 mm is 8.66 inches

If you are looking for a kid size Apple Watch band, the 130 mm may be your best option. You can also shop third-party watch bands specifically made for children with smaller wrists.

Return to Top

Bonus: Caring for Your Apple Watch Bands

People often wonder, "is it bad to change my Apple Watch band daily?" The answer is no. According to Apple, it is perfectly safe for your watch and bands to change them as often as you wish. As long as you remove and put on Apple Watch bands correctly, there shouldn’t be any wear and tear associated with changing them. However, if you are using third-party Apple Watch bands, the band could potentially wear out over time.

Pro Tip 

Apple Watch bands can get a little gunky if you wear them every day. Make sure you learn how to clean the bands properly without damaging them.

Return to Top

Whether you are shopping for Apple Watch bands for women or men, figuring out how to measure wrist size to achieve the perfect fit can be challenging. We hope this article helped you make a more informed decision when deciding between Apple Watch band sizes! Next, learn why does my Apple Watch keep locking while I’m wearing it?


  • How do you change Apple Watch face? Apple Watch bands aren't the only way to customize your Apple Watch! You can change your Apple Watch face directly from your watch, from your phone, and you can even download third-party Apple Watch face apps.
  • What are the best Apple Watch Ultra bands? It depends on your needs and preferences. I've enjoyed Sandmarc's Titanium Band ($199) and cheap Velcro or scrunchy Amazon Apple Watch bands. Here the five best name-brand Apple Watch Ultra bands.
  • How do I know which Apple Watch I have? We have an article that answers the question "what Apple Watch do I have?" that will help you answer that question!
Master your iPhone in one minute a day: Sign up here to get our FREE Tip of the Day delivered right to your inbox.


Author Details

Olena Kagui's picture

Author Details

Olena Kagui

Olena Kagui is a Feature Writer at iPhone Life. In the last 10 years, she has been published in dozens of publications internationally and won an excellence award. Since joining iPhone Life in 2020, she has written how-to articles as well as complex guides about Apple products, software, and apps. Olena grew up using Macs and exploring all the latest tech. Her Maui home is the epitome of an Apple ecosystem, full of compatible smart gear to boot. Olena’s favorite device is the Apple Watch Ultra because it can survive all her adventures and travels, and even her furbabies.