What Bands Fit a 45mm Apple Watch? Compatibility Guide + Best Straps (2025)
What Bands Fit a 45mm Apple Watch? Compatibility Guide + Best Picks
When upgrading to the sleek and functional 45mm Apple Watch, one of the most common questions is: What bands actually fit the 45mm case size? Whether you're upgrading from a 41mm or 44mm model or buying your first Apple Watch, understanding band compatibility is crucial for comfort, style, and durability.
In this ultimate guide, we'll break down Apple Watch band compatibility by size, series, and use case—while showcasing some of the best 45mm-compatible bands you can buy today from TrendyStraps.
Quick Navigation
- Will a 41mm Band Fit a 45mm Apple Watch?
- What Size is the Apple Watch 45mm Strap?
- Are 44mm and 45mm Bands the Same?
- Do 45mm Bands Work Across Series?
- Best Bands for Apple Watch 45mm
- FAQ: Apple Watch Band Fitment for 45mm
Will a 41mm Band Fit a 45mm Apple Watch?
The short answer is: No. A 41mm Apple Watch band is not designed to fit a 45mm Apple Watch. Apple Watch bands are grouped by case size ranges:
- 38mm, 40mm, and 41mm bands are interchangeable.
- 42mm, 44mm, 45mm, and 49mm bands are interchangeable.
Therefore, if you have a 45mm Apple Watch, you'll need a band designed for 42–49mm sizes. A 41mm band may appear too small, may not lock securely, or may not fit the lugs at all.
What Size is the Apple Watch 45mm Strap?
The Apple Watch 45mm uses bands compatible with the large case range. You should look for band sizes labeled:
- 42mm / 44mm / 45mm
- Ultra / 49mm
The strap width for these bands is typically around 24mm at the connection point. If you’re buying a third-party band, such as from TrendyStraps, always confirm the label says "fits 42–45mm Apple Watch." Luckily, TrendyStraps makes it simple by specifying exact compatibility on every product page.
Are 44mm and 45mm Bands the Same?
Yes, 44mm and 45mm Apple Watch bands are cross-compatible. The difference between the 44mm and 45mm cases is just 1mm and doesn't affect the lugs or fitment mechanism.
This means if you already own a 44mm band, you can continue using it with your new 45mm Apple Watch. Apple intentionally designed this compatibility to encourage ecosystem consistency across generations.
Do 45mm Apple Watch Bands Work Across Series?
Yes, 45mm bands are compatible with several Apple Watch models and series:
- Apple Watch Series 7 (45mm)
- Apple Watch Series 8 (45mm)
- Apple Watch Series 9 (45mm)
- Apple Watch Ultra (49mm)
- Apple Watch Ultra 2 (49mm)
- Older models with 42mm / 44mm sizing
For example, a band that fits Series 3 (42mm) will also fit Series 8 (45mm), and vice versa. Just make sure you're shopping within the large-case range (42–49mm).
Best Bands That Fit 45mm Apple Watch (from TrendyStraps)
If you're ready to upgrade your Apple Watch look, here are the top band recommendations from TrendyStraps, all fully compatible with the 45mm Apple Watch size:
1. Stylish Leather Strap
Premium leather look with modern detailing. Perfect for casual and formal wear.
2. Sport Loop Bands
Breathable, adjustable, and ultra-lightweight—ideal for fitness and all-day wear.
3. Jewelry Style Bands
Elegance meets function. These diamond-inspired bands double as stylish wristwear.
4. Rugged Silicone Sports Band
For extreme workouts or outdoor adventures. Sweat-proof and shock-resistant.
5. Slim Metal Bracelet
Minimalist and classy. Great for business or evening wear.
6. Slim Sports Breathable Bands
Flexible, breathable, and designed for comfort during workouts.
7. Retro Style Leather Strap
Vintage vibes with modern tech. A conversation starter for any Apple Watch user.
8. Diamond Style Strap + Case
Luxury and protection in one bundle. Ideal for fashion-forward Apple Watch users.
9. Titanium Link Bracelet
Premium-grade titanium links for a strong, sophisticated finish.
10. Bold Titanium Bracelet
Bold design and built to last. Excellent for large wrists and professional styling.
Frequently Asked Questions
Can I use a 41mm band on a 45mm Apple Watch?
No, 41mm bands are not compatible with 45mm cases due to different lug widths.
Are 42mm and 45mm Apple Watch bands the same?
Yes, 42mm bands are compatible with 45mm watches. Apple designed backward compatibility for larger case sizes.
Will a 45mm Apple Watch strap fit 46mm?
If you mean a third-party 46mm watch, likely not. But if you're referring to another Apple Watch like the Ultra (49mm), yes, 45mm bands will fit it.
How do I know my Apple Watch strap size?
Check the back of your Apple Watch—it shows the case size (e.g., 45mm). Match it with bands marked for 42–45mm compatibility.
What’s the difference between 44mm vs 45mm Apple Watch band?
Practically none in terms of compatibility. The size increase is only 1mm and all 44mm bands fit 45mm cases.
Final Thoughts: Choosing the Right Band for Your 45mm Apple Watch
Now that you know exactly what bands fit a 45mm Apple Watch, you can shop confidently knowing your new strap will lock in securely and look amazing. Whether you prefer sporty silicone, premium leather, bold titanium, or diamond-styled jewelry bands, TrendyStraps has you covered.
Don't settle for one band—swap them out to match your lifestyle. Click through the recommendations above to find the perfect fit for your 45mm Apple Watch today.
