Very Small. We love the mouse for our 6yr. It was the right price and size for a school Chromebook. Can't get lost as easily as her last one. The cable no longer retracts, but works perfectly. (She played with the cord for 6 years) The cord took about a month to retract which is good for the child. I would call this mouse a mini mini mouse. It's smaller than my mini mouse that I use. That's about 1/3 the size of a standard mouse. She does all the schoolwork with him and plays a few games. (Prodigy, Lexia, other educational games) We love the right and left click, which you can't always do on a mini or tablet at all. Scrolls well. My adult wife's hand can use it to help her, but as an adult I don't want to use it daily like her. It would be good for light use and good for traveling. I just took a star off for adult comfort and the cord pulling didn't last as long as I was hoping. Would buy them again for her at this price.
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