Quoted so it will alert you. You might check out the Zalman brand. I can’t remember exactly which one mine is, but it’s almost exactly like this one. (The two side buttons are silver on mine.) This is probably the updated version since I’ve had mine for a few years.
I have small hands. Typically wear a size 5 on my ring finger. Guesstimating that from wrist to tip of middle finger is about 6.5 inches.
https://www.amazon.com/Zalman-Optical-2500DPI-Multi-Button-ZM-M300/dp/B007QXLSOG/ref=sr_1_1?keywords=zalman+mouse+7&qid=1552254187&s=electronics&sr=1-1-catcorr