Lowest score shown
- score 9/100
Right-hand sculpt; thumb rest under your fingers.
- score 31/100
Large body; forward side button out of reach for hands under 170 mm.
Logitech · Mice & keyboards
Logitech MX Master 3S
$89–$109.99 · See current price
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Independent evaluation
Why this fits you
Product facts
Excellent mouse, right-hand sculpt only. There is no left-handed version.
Listed so nobody buys it hoping. The thumb rest and side buttons are on the right-hand side; Logitech has never made a left version of the MX Master.
Sources & testing
Against: From specs · Left-handed · Sep 6, 2026
Right-handed shape.
Logitech spec
Against: Users report · Left-handed · Sep 6, 2026
Returned it twice hoping it would work.
8 members
Against: We tested · Small hands · Sep 1, 2026
Two of three small-hand testers could not reach the forward button without shifting grip.
Fews workshop
Against: Users report · Small hands · Sep 6, 2026
Too big, cramped after an hour.
6 members
Disagree? Tell us — reports go into review, never straight to the score.
Who shouldn't buy this
- Left-handers: the thumb shelf sits under your fingers.
- Small hands: 124 mm long, 51 mm high — most testers under 170 mm hand length couldn't reach the forward button.
Specs that matter for your traits
| Handedness | Right only |
|---|---|
| Length | 124 mm |
| Height | 51 mm |
| Ships to | Worldwide |
| Returns | 30 days |
Members say
Verified by 14 members
Alternatives with a better fit
Mirrored shell with thumb buttons on the correct side.