black Matisse slide for Fitbit Flex 3D printed black Matisse slide for Fitbit Flex Easily transform your Fitbit Flex into a beyond-chic bracelet Rock your Fitbit all the time - at the gym, the office, and even when you are out on the town. Available in premium silver, polished brass, and 3 colors of strong and flexible plastic: white, black & grey. Dimensions - 1.4" l x 0.7" w x 0.5" h