You’ve got a Garmin on your wrist and a strap in your cart, and you still can’t tell if it’ll fit. Garmin uses four band widths across the whole lineup: 18mm, 20mm, 22mm, and 26mm, so you don’t want to guess your size. In this post we’re going to discuss each Garmin band width, break down the sizes and connector types for current Garmin devices, and show you how to confirm your own strap size so you can find your best fit.
Key Takeaways
- Garmin uses four band widths across its lineup: 18mm, 20mm, 22mm, and 26mm.
- Band width, also called lug width, is tied to your watch’s case size, so a single series can span two or three widths across its size variants.
- Your strap size isn’t measured by case size. The most useful number when shopping for a new strap is your lug width.
- Current Garmin devices use two different connector types: QuickFit and standard quick-release.
- You can confirm your own band width in seconds with the number on the back of your strap or a ruler.
Garmin Band Sizes at a Glance
A lug width is what you use to determine the size of strap you need for your Garmin device. It’s the space between the connector points where the device meets the strap. The case size helps you determine the size of your lug width. Garmin offers a few different size options.
| Lug Width | Typical Case Size | Example Models |
|---|---|---|
| 18mm | Smallest cases, around 40mm | Forerunner 255S, 265S, Venu 2S, Venu 3S, Vivoactive 4S |
| 20mm | Small to mid cases, around 41mm–43mm | Fenix 7S, Venu 3, Vivoactive 5, Forerunner 245 |
| 22mm | Mid to large cases, around 45mm–47mm | Fenix 7, Forerunner 965, Instinct 2, Epix Gen 2 |
| 26mm | Largest cases, around 51mm | Fenix 7X, Instinct 2X, Epix Pro 51mm, Tactix 8 51mm |
Since the case and lug width vary by Garmin model, you need to know which specific Garmin device you have in order to purchase a new strap. For instance, Garmin’s Fenix line offers different sizes.
You also have to consider connector type. Garmin offers QuickFit and standard quick-release connector types. QuickFit snaps in using Garmin’s proprietary connector, while quick-release uses two spring bars to connect to the lugs. Connector type also varies by Garmin line and model. The Forerunner line, for example, offers different sizes and connector types.
Garmin Band Size Chart by Series
Much like our Garmin Lug Widths & Strap Size Guide, the charts below will help you find your watch model, then determine your case size, lug width, and connector.
Fenix Series
| Model | Case Size | Lug Width | Connector |
|---|---|---|---|
| Fenix 5S, 5S Plus | 42mm | 20mm | QuickFit 20 |
| Fenix 5, 5 Plus | 47mm | 22mm | QuickFit 22 |
| Fenix 5X, 5X Plus | 51mm | 26mm | QuickFit 26 |
| Fenix 6S | 42mm | 20mm | QuickFit 20 |
| Fenix 6 | 47mm | 22mm | QuickFit 22 |
| Fenix 6X | 51mm | 26mm | QuickFit 26 |
| Fenix 7S, 7S Pro | 42mm | 20mm | QuickFit 20 |
| Fenix 7, 7 Pro | 47mm | 22mm | QuickFit 22 |
| Fenix 7X, 7X Pro | 51mm | 26mm | QuickFit 26 |
| Fenix 8 43mm | 43mm | 20mm | QuickFit 20 |
| Fenix 8 47mm | 47mm | 22mm | QuickFit 22 |
| Fenix 8 51mm | 51mm | 26mm | QuickFit 26 |
| Fenix E | 47mm | 22mm | QuickFit 22 |
| Fenix Chronos | 42mm | 22mm | Standard quick-release |
Fenix models have long used a naming convention to flag case size: an S for the small version, an X for the large one, and no letter for the standard size. Garmin changed that with the recent Fenix 8 line, putting the case size right in the model name instead.
Forerunner Series
| Model | Case Size | Lug Width | Connector |
|---|---|---|---|
| Forerunner 55 | 42mm | 20mm | Standard quick-release |
| Forerunner 165 | 43mm | 20mm | Standard quick-release |
| Forerunner 245, 645 | 42mm | 20mm | Standard quick-release |
| Forerunner 745 | 44mm | 22mm | QuickFit 22 |
| Forerunner 255S, 265S | 41mm | 18mm | Standard quick-release |
| Forerunner 255, 265 | 46mm | 22mm | Standard quick-release |
| Forerunner 935, 945, 955, 965, 970 | 47mm | 22mm | QuickFit 22 |
| Forerunner 570 42mm | 42mm | 20mm | Standard quick-release |
| Forerunner 570 47mm | 47mm | 22mm | Standard quick-release |
The Forerunner chart shows that case size and lug width don’t always move together. Two Forerunners with different case sizes can share the same lug width, which means they can take the same straps.
Instinct Series
| Model | Case Size | Lug Width | Connector |
|---|---|---|---|
| Instinct (original) | 45mm | 22mm | Standard quick-release |
| Instinct 2S | 40mm | 20mm | Standard quick-release |
| Instinct 2 | 45mm | 22mm | Standard quick-release |
| Instinct 2X | 50mm | 26mm | Standard quick-release |
| Instinct 3 45mm | 45mm | 22mm | Standard quick-release |
| Instinct 3 50mm | 50mm | 26mm | Standard quick-release |
| Instinct Crossover | 45mm | 22mm | Standard quick-release |
| Instinct E 40mm | 40mm | 20mm | Standard quick-release |
| Instinct E 45mm | 45mm | 22mm | Standard quick-release |
The Instinct line sticks with standard quick-release connectors instead of QuickFit, even on its biggest models.
Venu and Vivoactive Series
| Model | Case Size | Lug Width | Connector |
|---|---|---|---|
| Venu | 43mm | 20mm | Standard quick-release |
| Venu 2S | 40mm | 18mm | Standard quick-release |
| Venu 2 | 45mm | 22mm | Standard quick-release |
| Venu 2 Plus | 43mm | 20mm | Standard quick-release |
| Venu 3S | 41mm | 18mm | Standard quick-release |
| Venu 3 | 45mm | 22mm | Standard quick-release |
| Venu 4 41mm | 41mm | 18mm | Standard quick-release |
| Venu 4 45mm | 45mm | 22mm | Standard quick-release |
| Venu Sq, Venu Sq 2 | 40mm | 20mm | Standard quick-release |
| Vivoactive 3 | 43mm | 20mm | Standard quick-release |
| Vivoactive 4S | 40mm | 18mm | Standard quick-release |
| Vivoactive 4 | 45mm | 22mm | Standard quick-release |
| Vivoactive 5 | 42mm | 20mm | Standard quick-release |
| Vivoactive 6 | 42mm | 20mm | Standard quick-release |
Venu and Vivoactive all use standard quick-release connectors, so width is the only variable to track. The small models, like the Venu 2S, Venu 3S, and Vivoactive 4S, drop to 18mm, while the full-size versions step up to 22mm, so two watches in the same family often can’t share a strap.
Epix, Approach, and Specialty Series
| Model | Case Size | Lug Width | Connector |
|---|---|---|---|
| Epix Gen 2 | 47mm | 22mm | QuickFit 22 |
| Epix Pro 42mm | 42mm | 20mm | QuickFit 20 |
| Epix Pro 47mm | 47mm | 22mm | QuickFit 22 |
| Epix Pro 51mm | 51mm | 26mm | QuickFit 26 |
| Approach S12, S40, S42 | around 43mm | 20mm | Standard quick-release |
| Approach S60, S62 | 45mm | 22mm | Standard quick-release |
| Approach S70 42mm | 42mm | 20mm | Standard quick-release |
| Approach S70 47mm | 47mm | 22mm | Standard quick-release |
| MARQ, MARQ Gen 2 | 46mm | 22mm | QuickFit 22 |
| Quatix 5, 6, 7 | 47mm | 22mm | QuickFit 22 |
| Quatix 7X, 8 47mm | 47mm | 22mm | QuickFit 22 |
| Quatix 8 51mm | 51mm | 26mm | QuickFit 26 |
| Tactix 7, 8 47mm | 47mm | 22mm | QuickFit 22 |
| Tactix 8 51mm | 51mm | 26mm | QuickFit 26 |
| Enduro, Enduro 2, Enduro 3 | 51mm | 26mm | QuickFit 26 |
| Descent Mk2S, Mk3 43mm | 43mm | 20mm | QuickFit 20 |
| Descent MK2, Mk2i, Mk3i 51mm | 51mm | 26mm | QuickFit 26 |
| D2 Air X10, X15 | 43mm | 20mm | Standard quick-release |
| D2 Mach 1 | 42mm | 20mm | Standard quick-release |
| D2 Delta | 47mm | 22mm | Standard quick-release |
This group pulls together Garmin’s outdoor, tactical, golf, and dive watches, so it covers every width. The flagship adventure and dive models, like the Enduro and the 51mm Descent, take 26mm QuickFit, the widest band Garmin makes, while the golf-focused Approach line stays on standard quick-release at 20mm or 22mm.
How to Confirm Your Garmin Band Size in Seconds
While the chart is a useful resource to help you track down your lug width by model, there are a couple of other ways to size your watch in seconds. Either method below works for both QuickFit and standard quick-release models alike.
Method 1, Check the Strap Back
- Take the strap off your watch and turn it over.
- Look on the underside, near the connector, for a number followed by “mm.”
- That number is your lug width.
Method 2, Measure the Lug Gap
- Use a ruler or digital calipers.
- Measure the gap between the two lugs on one side.
- A gap of 20mm means any 20mm band fits.
Garmin lists band width under a watch’s physical size in its device specs, so you can cross-check there too. Changing your watch strap is easy once you know the steps, whether it’s QuickFit or quick-release.
Measuring Strap Length vs Lug Width
Two numbers get mixed up here, and it’s worth clearing up before you shop. Lug width is the strap width your watch takes. Strap length is how the straps fit around your wrist.
If you have an average sized wrist, it’s likely that the standard length strap will fit you. StrapsCo offers various straps that come in extra small or extra long to accommodate users with smaller or larger wrists.
Determining your strap length is easy:
- Measure your old strap: Remove the straps from your device and put both ends together to measure the total length in millimeters.
- Measure your wrist: You can measure your wrist with a printable ruler or a seamstress measuring tape. Keep in mind that the watch case will add extra length to the measurement, but also that the straps can be adjusted to accommodate extra length.
These are the two easiest ways to remove the guesswork and get the right length for your new straps.
Final Thoughts
Finding your correct strap size comes down to two steps. Read your lug width off the chart above, then confirm it with the number on the back of your strap or a quick measurement of the lug gap. Once your width and connector are locked in, you’re ready to shop with confidence. Browse the Garmin Watch Bands collection by width and find your fit.
Are you having trouble finding the right size for your Garmin device?
Frequently Asked Questions
What band sizes do Garmin watches come in?
Garmin watches come in four band widths: 18mm, 20mm, 22mm, and 26mm. The width your watch takes depends on its case size, so smaller cases run 18mm or 20mm and the largest cases run 26mm. Check your model in the chart above, or read the width embossed on the back of your strap, to find your exact width before you order.
Do all watches in a Garmin series use the same band size?
No. Band width is set by case size, not the series name, so one series often spans two or three widths. A Venu 3S takes 18mm while the full-size Venu 3 takes 22mm, and a Fenix 7S, 7, and 7X take 20mm, 22mm, and 26mm. Always confirm which size variant you own before you buy.
What size band does the Fenix 7 take?
The standard Fenix 7 takes a 22mm QuickFit band on its 47mm case. The smaller Fenix 7S takes 20mm, and the larger Fenix 7X takes 26mm, so the three sizes don’t share bands. QuickFit clicks on with no tools, so look for a QuickFit 22 band for a standard Fenix 7 or 7 Pro.
How do I measure my Garmin lug width?
Lay a ruler across the gap where the band meets the case or use a caliper and measure between the two lugs. A gap of 20mm means the watch takes a 20mm band. You can also turn the strap over and read the width embossed on its underside. Both methods work whether your watch uses QuickFit or standard quick-release.
