It is not one size fits all.
The connector was too wide for my apple watch 7.  It stuck out 1.5 to 2 mm on each side at the attachment to the watch, snagged on all my clothes, and scratched my skin. It was hard to attach and not tight enough to watch my heart rate. The side bands were loose and not close to the center strap when it wrapped around so it did not look good.  Good idea and pretty beads but not very functional.
Rating: 2 stars