These are flippers for your hands. I designed these two flippers to help propel me faster while swimming underwater. These held up well and made a noticeable difference while using them to swim. I highly recommend using flexible filament for this print, it makes them much more comfortable.
There are two files, one for each hand. You will see a left and right hand STL file.
These were designed for an adult's hand but with a slight sizing up or down in your slicer, these should hopefully work for smaller or larger hands as well. I will work on posting additional sizes though.