Thus, to make sure you don't make a mistake in choosing your Apple Watch strap, you must take two criteria into account : The size of your wrist and the size of your watch case.
Apple Watch band size guide
Bands compatible with the Apple Watch come in a variety of materials, each with its own characteristics.
Determine your wrist size
When you get an Apple Watch (sometimes called an iWatch or smartwatch), you need to consider the size of the band.
An ideally worn watch strap should neither be too tight nor too tight.
In general, the male wrist measures 150 to 190 mm while there are 130 to 180 mm for women.
In order to determine the ideal length of your bracelet, you will have to start by taking the measurement of the circumference of your wrist.
To measure your wrist, take a tape measure, if you don't have one, use a piece of string or a ribbon and then draw it on a ruler. Wrap your wrist loosely, once you get the measurement, round up to half a centimeter above.
For example: 152 mm measured = 155 mm
If you have a wrist size between 130 and 200 millimeters, you can use the 38/40/41 millimeter Apple Watch straps.
On the other hand, if your wrist is between 140 and 200 millimeters in size, you can use bracelets for Apple Watch 42/44/45/49 millimeters.
Apple Watch case compatibility
Whether you have an Apple Watch series 0; series 1; series 2; series 3; series 4; series 5; series 6; series 7; series 8; SE or ultra, all models are compatible and follow the following rule :
Straps for 38mm, 40mm and 41mm cases are compatible with each other.
Straps for 42mm, 44mm, 45mm and 49mm cases are compatible with each other.
In practice :
I have an Apple Watch 38 mm: I select size 38/40/41 mm
I have an Apple Watch 40 mm: I select size 38/40/41 mm
I have an Apple Watch 41 mm: I select size 38/40/41 mm
I have an Apple Watch 42 mm: I select size 42/44/45/49 mm
I have an Apple Watch 44 mm: I select size 42/44/45/49 mm
I have an Apple Watch 45 mm: I select size 42/44/45/49 mm
I have an Apple Watch 49 mm: I select size 42/44/45/49 mm
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