Do you have to turn it off when finished? If so, how?

You don't have to turn it off but you can to save battery life. To turn it off turn it over, there is an on/off switch on the bottom of the mouse,

How long is the mouse? Would like to use it for a laptop an don't want a full-sized mouse. I have another one that's only 4" from front to back.

It's approx. 3 7/8" long by 2 1/4" (approximate because it is an irregular shape, and should be no more than a 1/16" off) Should do the trick for you. I use it for my laptop and love it! I hope this helps :)

ASIN	B00P43PCI8
Batteries	1 AA batteries required. (included)
Best Sellers Rank	#1 in Computer Mice
Customer Reviews	4.5 4.5 out of 5 stars (40,697)
Date First Available	November 1, 2014
Is Discontinued By Manufacturer	No
Item Weight	2.65 ounces
Item model number	910-003888
Manufacturer	Logitech
Product Dimensions	1.54 x 2.36 x 3.9 inches

Logitech M185 Wireless Mouse, 2.4GHz with USB Mini Receiver, 12-Month Battery Life, 1000 DPI Optical Tracking, Ambidextrous, Compatible with PC, Mac, Laptop - Black

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