Like another reviewer, my wrist is small and I needed one more hole to snug the band up. My husband solved that problem by ADDING ANOTHER HOLE USING A DRILL PRESS. So, the longer choice band seems big enough to accomodate large wrists, but the small band could be a little smaller.I like how easy it was to install and also how easy it would be to change band to another color if I wanted to--by pushing the tiny lever to release from watch vs needing to unscrew 4 screws to change the original style siicone bands to another.I'm happy with my purchase and delivery was quick.Appears to be sturdyUltimately this band is much more comfortable than my previous replacement band i had for my Vivosmart HR+Switching it was easy, and it did infact come with all tools necessary.My only concern is really how waterproof it is over time.I picked this band because I don't like wearing the rubber watch bands when I'm not exercising. This watch band was nice enough to wear with my work clothes. It's pretty, flexible and there are two different lengths for the part with holes, so it fits different wrist sizes. It's a little tricky at first to put the band on to the black connector, but once you figure out the quick connect metal part then it's fairly easy. I'm very happy with this purchase.Original Garmin band last just over two years. Ordered this. Goes right onto Garmin Vivosmart 3 with perfect fit. Comfortable, easy to adjust. The clasp was a bit tight for a couple of weeks, but now excess band slight right under.This is a wonderful watch band for looks and wear purposes. Leather outer and rubberized inner band to deal with water, sweat, and skin.Works delightfully.Excellent replacement for original x40 wristband. Comes with 2 adjustable band sizes, replacement screws and hex driver. I ordered the black and its slightly more stylish and much more comfortable than the original silicone black. The replacement connectors to the watch 'face' are comparable to a traditional watch and results in the two plastic adaptors (included also) marginally enlarging the stiffer face portion of the device. This could be an issue for an extremely small wrist...I have a smaller wrist for a man, and its perfect for me.Fit and feel is improved, functionality was unaffected in an Approach x40.Well made, not uncomfortable when wet, dries quickly, and looks stylish.