Custom Fit Grip

Logitech MX Master 3S/4S - Custom Grip Shell

Logitech MX Master 3S/4S - Custom Grip Shell illustration (placeholder, not an actual product photo)

Ergonomic grip shell for the Logitech MX Master 3S/4S, tailored to your hand size and grip style for more natural support and comfort during long work or gaming sessions.

$39.99

Your hand length, width, palm circumference, finger width, grip style, and comfort focus all shape this shell specifically for you — including a real, dedicated thumb notch. This isn't a generic, one-size-fits-all mouse grip. Currently right-hand only for both mouse models — left-hand is coming soon.

Measurements
Diagram showing how to measure hand length

Keep the tape straight, not diagonal — wrist crease to fingertip.

Measure from the wrist crease to the tip of your middle finger.

Diagram showing how to measure hand width

Measure straight across the widest part of your palm, excluding the thumb.

Measure across your palm at its widest point, excluding the thumb.

Diagram showing how to measure palm circumference

Wrap the tape snugly, not tight — just below the knuckles.

Wrap a tape measure around your palm, just below the knuckles.

Diagram showing how to measure finger width

Measure at the finger's middle knuckle, not near the tip or base.

Measure the width of your middle finger at the middle knuckle.

Fit preferences

Used for our reference when fitting your shell — does not change your price. Both MX Master 3S and MX Master 4S are currently right-hand only — a left-hand version is coming soon for both.

How you naturally hold this device most of the time — this changes the shell's height and grip thickness to match.

Where you feel the most strain or discomfort during long sessions — this adjusts the shell's shape at that spot (extra cushioning, more wrist support, or a dedicated thumb notch).

This is a material choice, not a shape change: soft prints in flexible TPU, firm prints in rigid PETG.

Quantity

All units in one order will use these same measurements — if you need different sizes, submit separate orders instead.

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