If the rumours are accurate, you might not be able to use your old Apple Watch bands with the upcoming Series 7 watches. The new wearable is rumoured to get flat edges and new sizes, meaning compatibility issues with the older models.
The Apple Watch Series 7 is expected to get bigger sizes at 41mm and 45mm. And while these are just 1mm difference, the new flat cases might affect how the bands will fit. But, of course, we'll only know this once Apple launches the device. It's expected to launch alongside the iPhone this month. But Apple hasn't confirmed the launch just yet.
Source: 9to5Mac