Best Buy: Logitech Cordless TrackMan Wheel 904346-0403
Logitech Cordless TrackMan FX Wireless Trackball Mouse, T-RA17 USB | #1792368933
& Logitech Cordless Trackman Optical International
A size comparison between the Logitech Cordless Trackman Optical, the Microsoft Trackball Optical, and the Elecom Huge, for if anyone is curious. : r/Trackballs