What are the size and weight differences between the medium and large Signature M650 models?
The medium model weighs 3.57 oz (101.2 g with batteries) and measures 37.8 mm H x 61.8 mm W x 107.9 mm D. The large model weighs 3.93 oz (111.2 g with batteries) and measures 41.5 mm H x 65.6 mm W x 118.9 mm D. Note that the large size is right-hand only for the B2B version. (Page 1)
From the official Logitech Logitech Signature M650 Wireless Mouse User manual, page 1
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