How do I adjust the length of the watch band?

This answer is a bit confusing. After struggling several hours, I discovered the secret . Once one of the links that appear “different” on the backside, flip the watch to the “good side”. I.e the side that shows. Then flip this side horizontally and you will see the tab that is easily drawn down with the finger to release the “hinge”

Will the scalloped silver band fit my 41 mm series 8 Apple Watch?

Not sure, I bought it as a gift for someone who has the 5 series.

Will this band fit with the kate spade scallop 2 smart watch? the band width required is 16mm.

Yes it does fit. The outer connector comes off and makes a perfect fit for the scallop 2. (It came with my scallop 2 as a second band.)

Does the pearl band have adjustable links?

The Kate Spade Pearl watch bracelet does have extra links available for purchase by contacting the manufacturer directly. It can also be adjusted for size.