A size comparison between the Logitech Cordless Trackman Optical, the Microsoft Trackball Optical, and the Elecom Huge, for if anyone is curious. : r/Trackballs
Logitech Cordless Optical TrackMan : LOG-910-000810 : The Keyboard Company
Auctions International - Auction: Jamestown School District, NY #16848 ITEM: New Logitech Optical TrackMan Cordless Trackballs and More