What Apple Watch Do I Have?

You’re Not Alone; Millions Have Asked, “ How do I know what Apple watch I have?”

Apple don’t make it easy for us, do they?

With over 100 million Apple Watches sold worldwide as of 2021  (Statista) and most likely even more currently, with new models released almost annually, it’s no wonder so many of us find ourselves asking the same question: “What Apple Watch do I have?”

And it’s not just tech novices wondering this. Even seasoned fitness tracking fanatics, the kind who track every single rep and every run, are also getting stumped when they try to buy a new strap or protective case and realise they’re not sure which model they’re actually wearing.

Here’s the thing, though: the difference between a Series 4, a Series 6, and an SE isn’t actually very obvious at all at first glance. The casing looks really similar. The strap sizes overlap. Unless you’re keeping track of launch dates and reading the latest tech blogs every week, it’s easy to lose track.

But knowing your model matters if you are looking to upgrade your watch strap, resell your device, or check compatibility for new features like ECG or blood oxygen tracking; identifying your Apple Watch correctly is step one. And yes, with the help of this guide, it will be easier than you think!

So, let’s walk you through it.

How Can I Tell What Apple Watch I Have? Step-by-Step Guide

So, if you're wondering how can I tell what Apple Watch I have, the quickest and most reliable method is through the Settings on the actual watch itself or via the Watch app on your iPhone. Here’s how you can check it in seconds:

📲 Go On Your Apple Watch:

1. Open the Settings app
   
   

2. Tap General
   
   

3. Tap About
   
   

4. Scroll down to Model — you'll see a number that looks something like this: MNK73B/A
   
   

5. Tap on it, and it will reveal a shorter identifier, something like A2157 or something similar.

This shorter number is your actual Apple Watch model number, and this is the key to unlocking the exact version you’re wearing. 

📦 Apple Watch Sizes Explained: What Does 40mm, 44mm or 45mm Actually Mean?

If you're staring at your Apple Watch and wondering what the “40mm” or “45mm” size actually means, you're not the first and won’t be the last. Let’s clear this up once and for all.

🧠 The size (in millimetres) is just the height of the actual watch face, from the top to the bottom.
It’s not the width of the strap or the thickness of the watch.
So when someone says they have a “44mm Apple Watch”, it means the watch case itself (the screen and metal frame) is 44mm tall.

Here’s an easy way to picture it:

👉 Imagine you’re looking at your Apple Watch screen straight on.
Now, measure from the very top edge to the bottom edge; that’s the size Apple is talking about. The physical design of each Apple Watch generation varies slightly, from the border size to the shape of the Digital Crown. Once you've identified your model, it's also worth checking how to wear your Apple Watch strap properly for the most accurate sensor readings and comfort.

🔁 Do all straps fit all sizes?

No, not quite, but here’s the good news:
Straps made for 38mm and 40mm usually fit each other. The same goes for 42mm, 44mm, and 45mm, they are also compatible across those close sizes.

Now that you're clued up on sizing, let’s match your model number to the exact Apple Watch version below 👇

📋 Apple Watch Model Numbers Full Reference List

🟢 Apple Watch Series 9

• A2982 (41mm, GPS)
  
  

• A2984 (45mm, GPS)
  
  

• A2983 (41mm, GPS + Cellular)
  
  

• A2985 (45mm, GPS + Cellular)
  
  

🟣 Apple Watch Series 8

• A2770 (41mm, GPS)
  
  

• A2771 (45mm, GPS)
  
  

• A2772 (41mm, GPS + Cellular)
  
  

• A2773 (45mm, GPS + Cellular)
  
  

🔵 Apple Watch Series 7

• A2473 (41mm, GPS)
  
  

• A2474 (45mm, GPS)
  
  

• A2475 (41mm, GPS + Cellular)
  
  

• A2476 (45mm, GPS + Cellular)
  
  

🔴 Apple Watch Series 6

• A2291 (40mm, GPS)
  
  

• A2292 (44mm, GPS)
  
  

• A2293 (40mm, GPS + Cellular)
  
  

• A2294 (44mm, GPS + Cellular)
  
  

🟡 Apple Watch SE (1st Gen)

• A2351 (40mm, GPS)
  
  

• A2352 (44mm, GPS)
  
  

• A2353 (40mm, GPS + Cellular)
  
  

• A2354 (44mm, GPS + Cellular)
  
  

🟠 Apple Watch SE (2nd Gen)

• A2722 (40mm, GPS)
  
  

• A2723 (44mm, GPS)
  
  

• A2724 (40mm, GPS + Cellular)
  
  

• A2725 (44mm, GPS + Cellular)
  
  

⚫ Apple Watch Series 5

• A2092 (40mm, GPS)
  
  

• A2093 (44mm, GPS)
  
  

• A2156 (40mm, GPS + Cellular)
  
  

• A2157 (44mm, GPS + Cellular)
  
  

⚪ Apple Watch Ultra

• A2622 (Ultra 1)
  
  

• A2986 (Ultra 2)

Now that you’ve figured out exactly which model you own, you’re ready to upgrade your strap.

👉 Explore Apple Watch straps tailored to your model and size for optimal levels of comfort, colour and performance in one place.

How can I tell what Apple watch I have based on Appearance Alone?

So, let’s say for whatever reason that your Apple Watch isn’t connected to your iPhone. Maybe it’s second-hand. Maybe it’s been a while since you bought it. Or maybe you just don’t want to dig through the settings. No worries at all; you can still figure out what Apple Watch you have by checking its physical features.

Here’s what you are looking for:

🔍 1. Look at the Case Size and Shape

As we covered earlier, the case size (38mm, 40mm, 41mm, etc.) gives you a solid clue.

• If the watch looks more square and compact, it’s likely one of the older models (Series 0–3).
  
  

• If it has a larger screen with rounded corners that spill closer to the edge, you’re probably looking own at a Series 4 or something even newer, especially Series 7 to 9, which have a noticeably thinner border around the device. 

👀 2. Check on the Back of the Watch

Turn your Apple Watch over. Around the ceramic or sapphire back, you’ll see some small writing. This will usually include:

• The case size (like “44mm”)
  
  

• Whether it’s GPS or GPS + Cellular
  
  

• And sometimes, the Series name
  
  

If you see “Series 8” or “SE”, that makes things much easier. But not all models include this information, though, so if it’s missing, use the other clues below.

🧭 3. Examine the Digital Crown

This little knob on the side can reveal a lot:

• Red dot or red ring = GPS + Cellular
  
  

• Plain silver/black crown = GPS only
  
  

• The red outline on newer models is slimmer than the full red dot used on earlier Cellular models
  
  

Bonus tip: The Apple Watch Ultra has a big orange Action Button on the side. If yours has that, the mystery is solved: you have an Ultra model!

💡 4. Compare the Display Style

• Series 7, 8, and 9 have a big, bright display that blends almost edge to edge
  
  

• Series 4–6 and SE models have slightly thicker borders around the screen
  
  

• Series 0–3 have the smallest screens and feel chunkier

In short, if you can't check the Settings, the design clues are your best friend. Once you’ve narrowed it down, head back to your model number list to confirm.

💁‍♀️ Looking for something that matches your style and your sweat sessions?

👉 Browse our Women’s Apple Watch Straps, which are elegant, breathable and made to move with you.

How can I tell what Apple watch I have based on Appearance Alone?

So, let’s say for whatever reason that your Apple Watch isn’t connected to your iPhone. Maybe it’s second-hand. Maybe it’s been a while since you bought it. Or maybe you just don’t want to dig through the settings. No worries at all; you can still figure out what Apple Watch you have by checking its physical features.

Here’s what you are looking for:

🔍 1. Look at the Case Size and Shape

As we covered earlier, the case size (38mm, 40mm, 41mm, etc.) gives you a solid clue.

• If the watch looks more square and compact, it’s likely one of the older models (Series 0–3).
  
  

• If it has a larger screen with rounded corners that spill closer to the edge, you’re probably looking own at a Series 4 or something even newer, especially Series 7 to 9, which have a noticeably thinner border around the device. 

👀 2. Check on the Back of the Watch

Turn your Apple Watch over. Around the ceramic or sapphire back, you’ll see some small writing. This will usually include:

• The case size (like “44mm”)
  
  

• Whether it’s GPS or GPS + Cellular
  
  

• And sometimes, the Series name
  
  

If you see “Series 8” or “SE”, that makes things much easier. But not all models include this information, though, so if it’s missing, use the other clues below.

🧭 3. Examine the Digital Crown

This little knob on the side can reveal a lot:

• Red dot or red ring = GPS + Cellular
  
  

• Plain silver/black crown = GPS only
  
  

• The red outline on newer models is slimmer than the full red dot used on earlier Cellular models
  
  

Bonus tip: The Apple Watch Ultra has a big orange Action Button on the side. If yours has that, the mystery is solved: you have an Ultra model!

💡 4. Compare the Display Style

• Series 7, 8, and 9 have a big, bright display that blends almost edge to edge
  
  

• Series 4–6 and SE models have slightly thicker borders around the screen
  
  

• Series 0–3 have the smallest screens and feel chunkier
  

In short, if you can't check the Settings, the design clues are your best friend. Once you’ve narrowed it down, head back to your model number list to confirm.

And once you know what Apple Watch you have, the fun part begins 😏

💁‍♀️ Looking for something that matches your style and your sweat sessions?

👉 Browse our Women’s Apple Watch Straps, which are elegant, breathable and made to move with you.

 

Why It Matters: Find the Perfect Strap for Your Specific Apple Watch

So now you’ve answered the question: “What Apple Watch do I have?” That’s great stuff. But now it’s time to take your device to the next level. 

Not all Apple Watch straps are created with the same levels of care and attention, and getting the right size and fit for your specific model makes a huge difference when it comes to both comfort and performance.

🎯 Avoid the Most Common Mistake: Buying the Wrong Size Strap

We see it all the time. Someone orders a new strap thinking “38mm” will fit their “42mm” Series 8. Or they buy a strap for Series 5, not realising they’ve got a newer Series 7. The result? Loose fits, dodgy adapters, or worse, a strap that won’t even clip in.

💪 The Right Strap = Better Performance + All-Day Comfort

Whether you’re smashing your Move goal for the day, tracking your VO2 max on a trail run, or just wearing your Apple Watch for a busy day at work, your strap needs to feel comfortable for all-day wear on your wrist. And if your current strap is causing discomfort or irritation, don’t just put up with it. Here’s what to do if your Apple Watch strap is causing a rash or skin irritation so you can stay focused on fitness, not friction.

That’s why we offer:

• Sports Style Apple Watch Straps – which are ultra-breathable, lightweight and sweat-resistant
  
  

• Metal Apple Watch Straps – smart, secure, perfect for office use and evening transitions
  
  

• Nylon Apple Watch Straps – ultra-comfortable for daily wear or for sleep tracking
  
  

• Premium Grade Classic Silicone Straps – soft, flexible, and gym-ready
  
  

So now that you’ve figured out how to know what Apple Watch you have, why not treat it to the upgrade it deserves?

👉 Browse our full range of Apple Watch straps here and find your perfect match. 🚀