How Do I Know What Size My Apple Watch Is?

Apple Watch comes in two different sizes – 38mm and 42mm. But how do you know which one is the right size for you? Follow our guide to find out!

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apple watch comes in two different sizes: 38mm and 42mm. You can use this guide to help you decide which size is right for you.

The 38mm watch is the smaller of the two sizes, with a case diameter of 38mm (1.5 inches). It has a resolution of 272×340 and a pixel density of 290ppi. The 42mm watch is the larger size, with a case diameter of 42mm (1.65 inches). It has a resolution of 312×390 and a pixel density of 302ppi.

If you’re unsure which size to get, you can use Apple’s Watch Size Comparator tool to compare the two side-by-side.

The Different Sizes of the Apple Watch

When you are choosing apple watch you have two main size options to choose from – 38mm and 42mm. The 38mm size is best for people with small to medium wrists, while the 42mm size is best for people with medium to large wrists. You can also choose between the sport band, classic buckle, and modern buckle options.


The apple watch is the smaller of the two sizes available. It has a height of 38mm, a width of 33.3mm, and a depth of 10.5mm. The screen size is 1.32 inches (33.02mm) in diameter, and the resolution is 272 x 340 pixels. The apple watch weighs in at 25 grams (0.88 ounces).


The apple watch has a slightly larger display than the 38mm model and battery life that is estimated tolast up to 18 hours per charge. It is also a bit heavier and thicker, measuring in at 10.5mm. The 42mm model may be a better choice if you want a watch with a little more presence on your wrist or if you have trouble seeing the display on the 38mm model.

How to Measure Your Wrist

To find out which case size is right for you, measure your wrist as shown in the diagrams. If you’re between two case sizes, choose the larger one.

Wrap a tape measure around your wrist. Place it where you want to wear apple watch making sure the tape measure is snug but not too tight. Make a note of the measurement in inches or centimeters. Look at the compatible sizes for each watch case.

38mm and 40mm cases: Compatible with 38mm and 40mm bands
42mm and 44mm cases: Compatible with 42mm and 44mm bands


There you have it! Now you know how to determine what size apple watch is. The next time you’re looking at Apple Watch bands or cases, you’ll be able to choose the right size for your watch.

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