My own spin on a 38mm Apple Watch series 2 stand. Different from others I found here is the charging puck goes in easy, then slides into a form-fitting final stage so it won't move around. Still easy to remove, there's a small hole to let you push the puck out from the back. I also added captive slots to the bottom to let you decide how the USB cable exits the model while holding the cable tightly against the bottom so your stand won't tip to one side or the other. Lastly, recessed pockets help you align non-skid stick-on feet to the bottom. If you prefer to use a foot with a screw, there's a hole for a screw behind the thin layer of plastic under each foot. Just break through the thin plastic and tighten a 2-56 (or similar) screw into the hidden hole.
I printed this on my Prusa MK3s/MMU2s with a single color eSun PLA. If your first layer is too tight (causing a wider first layer extrusion), you may need to use a utility knife to open up the slots on the bottom to get your USB cable to fit.
Inspired by the need to keep my charging puck from sliding off my nightstand every night... I designed this to be large enough to keep my watch and charger stable. The design came together quickly in SolidWorks and met my needs on the very first print. I hope you find it useful too.