The Samsung Galaxy Fit3 is ultra-light and easy to wear around the clock. But finding Galaxy Watch Fit3 bands that actually fit it? That's where most people get stuck.
The Fit3 uses a completely different band system than the Galaxy Watch lineup. Your Galaxy Watch 6 bands won't fit. Your friend's Watch 7 straps won't work. And most "Samsung compatible" results online are for the wrong size entirely.
This guide covers everything you need to know: what makes the Fit3's band system unique, which materials work best for different lifestyles, and the specific replacement straps we'd recommend.
Quick Answer: What size band does Galaxy Fit3 use?
The Galaxy Fit3 (SM-R390) uses a proprietary ~16mm band with a one-click push-button attachment. Standard 20mm Galaxy Watch bands, 22mm bands, and generic watch straps will not fit without an adapter. Always look for bands labeled specifically for the Galaxy Fit3 or SM-R390.
Editorial Note: Some products featured in this article are sold by Astra Straps. Recommendations are based on product specifications, customer feedback, and practical use cases relevant to the topic discussed.
Table of Contents
- Key Takeaways
- Galaxy Watch Fit3 Bands at a Glance
- Are Galaxy Watch Bands Compatible with the Fit3?
- What Makes the Fit3 Different from a Galaxy Watch?
- Best Galaxy Watch Fit3 Bands by Material
- How to Choose the Right Galaxy Watch Fit3 Band
- How to Swap Your Galaxy Fit3 Band
- Find Your Perfect Fit3 Band
- Frequently Asked Questions
Key Takeaways
- Galaxy Fit3 bands are NOT interchangeable with Galaxy Watch bands. Different size, different connector.
- Silicone is the best all-around pick for workouts, sleep tracking, and daily wear.
- Nylon solves the skin irritation problem that many Fit3 owners deal with from wearing silicone 24/7.
- Milanese steel dresses up the Fit3 for casual and semi-formal settings.
- Connector quality matters. Cheap Fit3 bands (especially metal ones) can have loose connections. Buy from a brand that tests specifically for the SM-R390.
Galaxy Watch Fit3 Bands at a Glance
Here's a quick comparison of the best Galaxy Watch Fit3 bands by material and use case.
|
Band |
Material |
Best For |
Standout Feature |
|
Emerio |
Silicone |
Daily wear + workouts |
Tuck-in strap design, great on small wrists |
|
Firmo |
Silicone |
Active lifestyle + style |
Magnetic closure, breathable cutouts |
|
Deleo |
Silicone |
Budget replacement |
Steel clasp, swim-tested by customers |
|
Neco |
Braided nylon |
Sensitive skin |
Stretchy, washable, no skin irritation |
|
Labellum |
Nylon loop |
Small/large wrists |
Velcro closure, infinite adjustability |
|
Debeo |
Milanese steel |
Dressing it up |
Magnetic mesh, snag-free finish |
Are Galaxy Watch Bands Compatible with the Fit3?
Short answer: no. This is the single most important thing to understand before you buy anything.
The Galaxy Fit3 uses a proprietary band attachment that's roughly 16mm wide. Standard Galaxy Watch models (Watch 4, 5, 6, 7, and FE) all use 20mm bands. The Galaxy Watch Ultra uses its own dynamic lug system. None of these are interchangeable with the Fit3.
Here's a quick reference so you don't accidentally order the wrong size:
- Galaxy Fit3: ~16mm proprietary bands (SM-R390 specific)
- Galaxy Watch 4/5/6/7/FE: 20mm standard quick-release bands
- Galaxy Watch Ultra: Proprietary dynamic lug system
- Galaxy Watch 3 (45mm) / Gear S3: 22mm standard bands
When you're searching online, always look for bands that specifically mention "Galaxy Fit3" or model number "SM-R390." Generic "Samsung watch band" listings almost always refer to the 20mm Galaxy Watch size.
The Fit3's bands click in and out using a push-button mechanism on the underside of the tracker. Press the release button, slide the old band out, push the new one in until it clicks. No tools needed.
Shop Galaxy Fit3 bands that are tested and confirmed to fit the SM-R390, with Astra Straps' 100-day quality guarantee.
What Makes the Fit3 Different from a Galaxy Watch?
If you picked the Fit3 over a full Galaxy Watch, you probably did it for a reason.
At roughly $60, it costs a fraction of what a Galaxy Watch 7 runs. It weighs about 10 grams less. And the battery lasts up to 13 days instead of the 40-ish hours you'd get from a Watch 7. That's a real difference when you're wearing it to bed for sleep tracking and don't want to charge every other night.
The tradeoff? The Fit3 skips GPS, Wi-Fi, NFC, a speaker, and third-party apps. It runs a lightweight operating system (not Wear OS), so it handles notifications, heart rate monitoring, step counting, and about 100 workout modes. For a lot of people, that's more than enough.
The 1.6-inch rectangular AMOLED display and slim aluminum-sided body give it a modern, clean look. But the stock silicone band that ships with it is pretty basic. That's where replacement Galaxy Watch Fit3 bands come in. The right band can completely change how the Fit3 looks and feels on your wrist.
Best Galaxy Watch Fit3 Bands by Material
Not every material works the same way on a fitness tracker you'll probably wear around the clock. Here's what you should know about each option.
Silicone: The Everyday Workhorse
Silicone is the most popular material for Galaxy Watch Fit3 bands, and for good reason. It's waterproof, easy to clean, lightweight, and flexible enough to stay comfortable during workouts and sleep.
Most silicone Fit3 bands use a tuck-in design where the excess strap slides into a loop rather than flopping around loose. That small detail makes a big difference in everyday comfort.
Best for: Daily wear and workouts
Why it stands out: Ventilation holes for breathability + PC buckle for secure adjustment
Key benefit: One of the most reliable options for smaller wrists. Reviewers consistently praise the tuck-in design as "much sleeker" than the stock band.
Best for: Active lifestyle with a touch of style
Why it stands out: Magnetic closure replaces the buckle for infinite, hole-free adjustment
Key benefit: Breathable cutout design keeps skin dry during physical work. Customers say the magnetic clasp is strong and comfortable for all-day wear.
Best for: Affordable, no-fuss replacement
Why it stands out: Stainless steel clasp, swim-tested durability
Key benefit: Held up well in customer reviews through swimming, gym sessions, and humid summer days. One buyer called it "as good, if not better than the original."
Nylon: When Silicone Irritates Your Skin
Here's something a lot of Fit3 owners run into: wearing any silicone or rubber band 24/7 can cause skin irritation over time. It's not a defect. It's what happens when moisture gets trapped against your skin for hours.
Nylon weave lets air pass through the band, so moisture evaporates instead of sitting against your skin. The fibers also dry quickly if they get wet from sweat or hand washing.
Best for: Sensitive skin and extended wear
Why it stands out: Polyester yarn braided around silicone thread for stretch without losing shape
Key benefit: Breathable, sweat-resistant, and washable. One customer with skin sensitivity wrote that the Neco "does not irritate at all" compared to non-fabric bands.
Best for: Wrists that are extra small or extra large
Why it stands out: Hook-and-loop (Velcro) closure with infinite adjustability
Key benefit: Parents love it for teenagers with smaller wrists. Several reviewers bought it specifically to solve skin irritation from silicone. As one customer put it, "The material is very light and dries quickly."
Looking for nylon or silicone Galaxy Watch Fit3 bands? Browse the full Fit3 collection with free tracked shipping on orders over $50.
Milanese Steel: Dressing Up a Fitness Tracker
One of the nicest things about the Fit3's slim, rectangular design is that it doesn't scream "fitness tracker" the way some bulkier wearables do. A Milanese mesh band leans into that quality and helps the Fit3 look at home where a chunky sport band would feel out of place.
Milanese bands are woven from thin stainless steel wire into a flat mesh. They're lighter than traditional link bracelets, and they typically use a magnetic clasp that lets you adjust the fit in tiny increments.
Best for: Dressing up your Fit3 for casual and semi-formal settings
Why it stands out: Corrosion-resistant stainless steel, snag-free smooth finish
Key benefit: Adds just enough weight to the 18.5g Fit3 to give it a more substantial feel without making it heavy. Purpose-built for the SM-R390.
A note on metal band connectors: The Fit3's proprietary click mechanism requires tight tolerances. Cheaper metal bands sometimes have connectors that don't lock securely. That's why it's worth buying from a brand that tests fit specifically for the SM-R390 rather than grabbing the cheapest listing you can find.
How to Choose the Right Galaxy Watch Fit3 Band
Your ideal band depends on how you actually use your Fit3.
- Workouts and sleep tracking? Stick with silicone. The Emerio and Deleo are both strong choices.
- Skin irritation from wearing it all day? Switch to nylon. The Neco's braided design or the Labellum's Velcro loop will let your skin breathe.
- Want it to look dressier? The Debeo Milanese mesh gives the Fit3 a more polished, jewelry-like appearance without adding bulk.
- Want comfort and style? The Firmo's magnetic silicone design works for both gym sessions and casual outings. The magnetic closure is also one of the easiest to put on with one hand.
How to Swap Your Galaxy Fit3 Band
Changing bands on the Fit3 is simpler than on most smartwatches.
- Flip the Fit3 over so you can see the sensor side.
- Press the small release button near where the band meets the tracker body.
- Slide the band away from the tracker.
- Align the new band's connector with the slot and push until you hear a click.
- Give it a gentle tug to confirm it's locked in place.
A couple of tips: Some bands (especially braided nylon) can take a little more force to click in the first time. That's normal. And if you're using a Velcro-style band like the Labellum, fold the band out of the way when you set the Fit3 on its charger.
Find Your Perfect Fit3 Band
The Galaxy Fit3 packs a lot into a tiny, lightweight package. The right replacement band lets you match it to your style, solve comfort issues, or just have fun switching things up day to day.
Skip the guesswork. Shop Galaxy Watch Fit3 bands that are guaranteed to fit the SM-R390. Every band in our Fit3 collection is tested for connector fit, backed by Astra Straps' 100-day quality guarantee, and ships free on orders over $50.
Frequently Asked Questions
Do Galaxy Watch bands fit the Fit3?
No. Galaxy Watch bands are 20mm wide with a different attachment system. The Fit3 uses a proprietary ~16mm connector. They're not interchangeable. Always buy bands specifically made for the Galaxy Fit3 (SM-R390).
What size band does the Galaxy Fit3 use?
The Galaxy Fit3 uses a proprietary band width of approximately 16mm with a one-click push-button connector. Standard watch band sizes (16mm, 18mm, 20mm spring bar straps) will not connect without an adapter.
Are Fit3 bands interchangeable with other Samsung trackers?
No. Even the older Galaxy Fit and Fit2 used different proprietary connectors. The Fit3's bands are only compatible with the Fit3 (model SM-R390).
