If you are left-handed, you should have no problem using this mouse. Children, or adults with smaller hands, might find that this mouse works well for them.
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Logitech M335 Wireless Mouse, 2.4 GHz with USB Unifying Receiver, 1000 DPI Optical Tracking, 18 Month Life Battery, Ambidextrous PC/Mac/Laptop - Blue
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Logitech M335 Wireless Mouse