It is bigger than expected but still looks very good.
Cerno Aviation Grade Stainless Steel Band
Cerno Aviation Grade Stainless Steel Band
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Powerful enough for the skies, refined enough for your wrist. The Cerno Aviation Grade Stainless Steel Band brings aerospace-level engineering to everyday elegance.
From high-pressure meetings to upscale evenings, the Cerno is a statement of strength, precision, and style. Once you put it on, you will never look at your Apple Watch the same way again.
Features:
- Crafted From Aviation-Grade Stainless Steel for unmatched strength
- Sleek, Luxury-Forward Design with polished detailing
- Double-Layer Locking Clasp keeps your watch secure at all times
- Waterproof And Rustproof Build resists wear, sweat, and rain
- Perfect Match For Formal And Professional Outfits
- Comes With A Removal Tool to tailor the fit to your wrist
- Modern Molded Design blends technology with timeless style
- Extremely Durable without compromising comfort
- Available In 10 Colours to match your vibe and personality
Details & Compatibility
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Fits Wrist Size:
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38MM / 40MM / 41MM / 42MM-S10/S11: 135mm - 217mm (5.3" - 8.5")
- 42MM / 44MM / 45MM / 46MM / 49MM: 139mm - 221mm (5.5" - 8.7")
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38MM / 40MM / 41MM / 42MM-S10/S11: 135mm - 217mm (5.3" - 8.5")
- Compatible with: Apple Watch Series 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, SE, SE 2, SE 3, Ultra, Ultra 2, and Ultra 3

Shipping & Returns
Shipping & Returns
Shipping
We offer FREE Tracked shipping on all orders! 📦
We offer Shipping to Singapore Only.
We process orders between Monday and Friday. Please note that we require 1 to 3 working days on average to fulfill your order before dispatching it. Rest-assured we are doing everything in our power to get your order to you as soon as possible! Once your order is dispatched, depending on your country or region, estimated delivery time is between 5 to 7 business days. Please consider any holidays or global events that might impact delivery times.
Returns
We offer hassle-free returns to our nearest dispatch center. To start a return just contact our support team at support@astrastraps.sg and we will make the process easy and effortless.
PLEASE NOTE: Due to delays caused by huge pressure on international and local shipping companies, orders may be delayed for arrival.
Questions?
Customer service is our number 1 priority and we will do whatever we can to take care of you. We greatly appreciate your consideration to do business with Astra Straps Singapore and please let us know if you have any questions. You can contact us at support@astrastraps.sg. Phone Support: +1 (469) 470 1801.
Our Guarantee
Our Guarantee

Money-Back Guarantee
Yup! that's right, we know you'll love our straps, which is why we offer a Risk-Free 100-Day Guarantee on all of them. This protects you from product faults, defects and lost in post shipments.
If you're not satisfied with your product simply contact our customer care team and we'll do whatever it takes to make sure you are 100% satisfied with your purchase. (see terms and conditions for more info). Any questions regarding our Money-Back Guarantee can be emailed to support@astrastraps.sg
Quality Guarantee
All Astra Straps Singapore products come with a Quality Guarantee. We can offer this guarantee because all our products are made to the highest standard. Be careful of cheap knockoffs on the web. All Astra Straps Singapore products have to pass our rigorous quality checks before being shipped to you, so we can guarantee quality! Any questions regarding our quality guarantee can be emailed to support@astrastraps.sg
*Free Tracked Shipping on all orders!
Questions?
Customer service is our number 1 priority and we will do whatever we can to take care of you. We greatly appreciate your consideration to do business with Astra Straps Singapore and please let us know if you have any questions. You can contact us at support@astrastraps.sg. Phone Support: +1 (469) 470 1801.
SIZE GUIDE
SIZE GUIDE
At Astra Straps, all our straps have specific and clear sizes indicated. Please check the sizing guide below before ordering. If you are still unsure, you may contact us here.
1. How do I know my wrist size?
Simply use a flexible measuring tape to wrap around your wrist and record the measurement on the tape that overlaps the zero end of the tape OR just grab any string/paper strips to do the same, then lay the string on a ruler to get your accurate wrist size.
In most cases, knowing your wrist size/length will be sufficient. Check your wrist size against the size of the strap that you wish to purchase on the individual product details page.
From there, you can select and purchase our watch straps: Small (S), Large (L) or Free Size.

2. What is the watch band width / watch lug measurement?

In certain cases, knowing your wrist size alone may not be sufficient. In such a scenario, you will need the watches' band width size, also know as the watch lug width size.
Your Apple watch will say the measurement on the back.

If you cant find the size on the back place the watch with the watch face facing up. Take the measurement of the distance between the lugs (where the watch strap fits).
For Apple Watches the you have the choice between 38MM, 40MM, 41MM, 42MM, 44MM, 45MM & 49MM, you can also enter your watch model number into a search engine to find what size your watch uses.
Apple Watch 7, 8, and 9: The Apple Watch Series 7, 8, and the newly released Series 9 are compatible with a wide range of our bands, including sizes 38MM, 40MM, 41MM, 42MM, 44MM, 45MM, and 49MM. For watch cases, they fit the 41MM and 45MM sizes.
Apple Watch Ultra and Ultra 2: The recently introduced Apple Watch Ultra and Ultra 2 are compatible with 45MM and 49MM bands. As for the watch cases, both the Ultra and Ultra 2 models are available in a 49MM size.
Using these three measurement data points, you are now ready to grab your strap!
Ask a question
Ask a question

Customer Reviews
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- Joseph Wallace J. W. Joseph W.20-01-2024
- Marilyn Bryant M. B. Marilyn B.20-01-2024
Very good quality, looks very cool on the hand, the liner is included so as not to scratch the watch.
- Arthur Perry A. P. Arthur P.20-01-2024
F**** beautiful color, real product look pretty good and shinny.
- Amber McCoy A. M. Amber M.20-01-2024
Good quality, it didn’t have a screen cover. I would love to add an extra layer of protection to it.
- Estrada Donna E. D. Estrada D.20-01-2024
Fits very well (Watch Series 2) the bracelet is not bad however, due to the features of delivery it got damaged and scratches all over the band.
- Walter Hudson W. H. Walter H.20-01-2024
Fantastic seller even when there was a problem with shipping the seller sorted it for me with no problem. Thank you for all your help I love the product. Excellent quality more than what I expected. Thank you Astra!
- Sierra Beasley S. B. Sierra B.02-11-2022
Shipping is faster than any other seller, 8 days delivered. I recommend this store Quality nice as usual and everything is great!
- Adelaide Franks A. F. Adelaide F.01-11-2022
It’s very nice!! But be aware that if you have a small wrist it may be too big. I adjusted it with the kit that was included and it was very easy to adjust the size, but I made it the smallest possible size and it’s perfect for me.
- Morgan Krueger M. K. Morgan K.02-05-2022
Product arrived within the specified time limits and perfectly matched the description.
- Katherine Sanchez K. S. Katherine S.02-01-2022
It’s a great product as described, quality is good and feels premium moreover it looks sassy on your wrist, delivered quickly around 15 days. Highly recommend the seller and store :)