Hi kevinfrombrigg,
Thanks for posting in Apple Communities.
We understand you have questions about band size for Apple Watch Series 8. You an choose from a variety of band styles. Once you have selected your choice, you will come to the product screen that will display the case size . You will need to select 41mm or 45mm. Below the case size will be listed the wrists size range.
The band you choose will specify the maximum and minimum wrist size. To get the correct band size, we recommend that you precisely measure around your wrist.
If you choose an Apple Watch with a Sport Band, first select your case size then select your band size. Sport Bands only come with one size in the box.
If you choose a Solo Loop band, you’ll need to use the sizing guide to find your exact size. When you shop for Solo Loop bands, there are step-by-step instructions to help you measure your wrist using a printable tool or household objects so you can find the correct size.
You can find these details at the bottom of the product you select in Frequently Asked Questions.
You can also find a link to Chat with an Apple Watch Specialist for more size questions on the desired product page.
Regards.