Logitech G G840 XL — Cloth Gaming Mouse Pad, Black
900 x 400 mm3 mm thinCloth over rubber2-year term
The G840 is the desk-sized member of the family: Logitech publishes it as 900 mm wide, 400 mm deep and 3 mm thick, built from a cloth surface with a rubber base. At that size the keyboard, the mouse and both forearms sit on one uninterrupted surface, which is the entire reason to buy an XL mat — no seam or edge in the middle of a movement, and no half of the mouse mat and half of the bare desk under your wrists. It is plain black with no artwork and no lighting, and Logitech covers its mouse pads with a 2-year limited hardware warranty. This is the one to choose in the range if space, not cushioning, is what you are after.
Compatibility — check before buying:
Measure the desk first: 900 mm wide by 400 mm deep covers most of a standard desktop and will overhang the front edge of a shallow one. At 3 mm it lies flat and adds almost no height, but that also means no cushioning — if a hard desk is your complaint rather than a lack of space, the 5 mm G740 is the answer instead. There is no wrist rest and no lighting. On what Logitech does not publish for the G840: no weight, no edge treatment, no surface friction rating and no washing instruction, and no water-resistance claim. Its own specification page lists dimensions and materials and nothing else, so we quote nothing else. If a stitched border is essential for you, several mats on this page publish theirs explicitly.
Best For
✓ Desks where keyboard and mouse share one surface
✓ Low-sensitivity players who sweep the mouse widely
✓ Setups where the desk surface itself tracks badly
✓ Anyone whose mat keeps ending up at an angle
✓ Optical and laser gaming mice
✓ Logitech G setups being matched up
Key Features
A whole desk of surface
900 x 400 mm puts keyboard, mouse and forearms on one uniform mat, so nothing catches on an edge mid-movement.
Thin enough to disappear
At 3 mm the mouse sits almost at desk height and there is no ridge under the heel of your hand.
Cloth over rubber
The plain, proven construction: a cloth tracking surface on a rubber base that holds a large mat still.
Two years from Logitech
A published 2-year limited hardware warranty on a mouse pad, which is longer than most brands offer at any price.
Technical Specifications
| Identification |
| Brand |
Logitech G |
| Series |
G840 XL Cloth Gaming Mouse Pad |
| Part Number |
943-000778 |
| EAN / GTIN |
5099206104310 |
| MPN |
943-000778 |
| Pad |
| Width |
900 mm |
| Depth |
400 mm |
| Thickness |
3 mm |
| Size class |
XL |
| Surface |
Cloth |
| Base |
Rubber |
| Colour |
Black |
| Weight |
Not published by Logitech |
| Edge treatment |
Not published by Logitech |
| Use |
| Surface friction rating |
Not published by Logitech |
| Washing instructions |
Not published by Logitech |
| Wrist rest |
Not included |
| Lighting |
None |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
Logitech publishes a 2-year limited hardware warranty for this model on its mouse pad warranty article. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration. |
Frequently Asked Questions
Will it fit my desk?
It is 900 mm wide by 400 mm deep. That covers most of a standard desktop. Measure the free depth in front of your monitor before ordering — on a shallow desk it will hang over the front edge.
Are the edges stitched?
Logitech does not publish an edge treatment for the G840, so we will not claim one either way. If a sewn border is essential, the Sharkoon and CHERRY XTRFY mats on this page publish theirs.
G840 or G740?
Space or cushioning. The G840 is 900 x 400 mm and 3 mm thin; the G740 is Large and 5 mm thick. Buy the G840 if you need room, the G740 if your desk feels hard.
Singular Expert Insight
An XL mat solves one problem completely: the mouse never runs out of surface and the keyboard never sits on bare wood. Logitech publishes less about the G840 than we would like — no edge treatment, no weight — and we are not filling that in. See our
mouse pads and wrist rests and our
wireless mice.
Buyer’s Guide
Buy it if
You want a full-desk 900 x 400 mm cloth mat from a brand that publishes a real two-year warranty on it.
Skip it if
Your desk is shallow, you want cushioning under the mouse, or you need a published stitched edge.
Also consider
The Logitech G740 if you want 5 mm of cushioning instead, or the Sharkoon SKILLER SGP40 if you want 500 mm of depth.