Best Answer: It's entirely subjective, but the Fitbit Charge 3 is a bit bulkier than other activity trackers that Fitbit offers, such as the Alta HR. The dimensions of the Charge 3 are 1.6 by 4 by 8.9 inches, and it weighs 1.76 ounces. While it may not seem like a big deal, the bulkiness of the Charge 3 may lead to some discomfort as it might press against wrist bones, depending on the fit. If you are looking for a slim and small activity tracker that still has continuous heart rate monitoring, you should look into something like the Fitbit Alta HR instead.Fitbit: Fitbit Charge 3 ($130)Fitbit: Fitbit Alta HR ($100)