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Keyboard Dimensions

Here is a list of the dimensions of various IBM and family keyboards. Included are measurements in millimetres and inches and are measured to approximately +- 0.2mm accuracy.

Keyboard
Dimensions (length x depth x height)
Notes
Model F/XT PC Keyboard
486mm x 196mm x 34mm
(19.13" x 7.72" x 1.34")
The length measurement includes the riser feet handles. Excluding them, the keyboard is 456mm long.
Model F 5291 Terminal Keyboard
515mm x 230mm x 32mm
(20.28" x 9.06" x 1.26")
The length measurement includes the riser feet handles. Excluding them, the keyboard is 484mm long.
Model M Enhanced PC Keyboard
487mm x 207mm x 47mm
(19.17" x 8.15" x 1.85")
Model M Type III 122-key Keyboard
526mm x 212mm x 51mm
(20.71" x 8.35" x 2.01")
Model M Type IV 122-key Keyboard
526mm x 212mm x 51mm
(20.71" x 8.35" x 2.01")
Model M3 Numeric Keypad
91mm x 121mm x 38mm
(3.58" x 4.76" x 1.5")
Model M4 Space Saver Keyboard
330mm x 60mm x 38mm
(12.99" x 2.36" x 1.5")
Model M4-1 Space Saver TrackPoint II Keyboard
330mm x 60mm x 38mm
(12.99" x 2.36" x 1.5")
Model M4-1 Space Saver Numeric Keypad
92mm x 60mm x 38mm
(3.62" x 2.36" x 1.5")
New Model M Space Saving Full-Sized Keyboard
476mm x 188mm x 50mm
(18.74" x 7.4" x 1.97")