What about a vertical mouse like Logitech Lift? https://www.logitech.com/en-us/products/mice/lift-vertical-ergonomic-mouse.html https://www.logitech.com/en-us/p

What about a vertical mouse like Logitech Lift? https://www.logitech.com/en-us/products/mice/lift-vertical-ergonomic-mouse.html https://www.logitech.com/en-us/products/mice/lift-vertical-e... Perhaps you already tried it, but the grip is very thin and pleasant. It is in fact advertised for small hands. Another alternative is a trackpoint. You could try any USB keyboard from ThinkPad or TEX: https://tex.com.tw/pages/back-to-the-future https://tex.com.tw/pages/back-to-the-future