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Keylayer Plate Thickness
published: 2026-03-15
Q: how thick should a mechanical keyboards key switch layer be?
A: 1.5 mm to 1.6 mm
The standard thickness for a mechanical keyboard switch plate is 1.5 mm to 1.6 mm, which aligns with the official Cherry MX datasheet specification of 1.5 ± 0.1 mm.
1.6 mm is the most common thickness for FR4/PCB plates and is widely accepted for 3D-printed plates to ensure rigidity. 1.2 mm is required specifically for Kailh Choc low-profile switches to allow their stabilizers to clip properly. Plates thicker than 1.6 mm (up to 3 mm for printed, or 4.5 mm for specialized designs) often require the switch notches to be carved or recessed, as standard clips may not engage correctly on thicker materials.
Sources:
- https://www.reddit.com/r/ErgoMechKeyboards/comments/1c7rfgw/how_thick_should_be_switch_plate_for_mx_switches/
- https://www.reddit.com/r/MechanicalKeyboards/comments/s8cscf/about_how_thick_are_keyboard_plates_like_where/
- https://www.reddit.com/r/MechanicalKeyboards/comments/47rbys/mounting_plate_thickness/
- https://github.com/josefadamcik/SofleKeyboard/issues/136
- https://www.reddit.com/r/MechanicalKeyboards/comments/s8cscf/about_how_thick_are_keyboard_plates_like_where/
- https://www.keebtalk.com/t/fat-plates/2787
- https://www.reddit.com/r/ErgoMechKeyboards/comments/1c7rfgw/how_thick_should_be_switch_plate_for_mx_switches/
- https://github.com/josefadamcik/SofleKeyboard/issues/136
- https://www.reddit.com/r/MechanicalKeyboards/comments/47rbys/mounting_plate_thickness/
- https://hackaday.io/project/185358/log/215107-critical-dimensions-for-plate-and-case