This is a list of physical dimensions for various IBM and family keyboards. Measurements are included in millimetres and inches, measured to an approximate accuracy of +- 0.2mm accuracy. Any measurements without a source were measured by myself.

Keyboard

Dimensions (length x depth x height)

Notes

Source

Model B 6580-type Displaywriter Type A Keyboard

538mm x 213mm x 101mm

(21.18" x 8.39" x 3.98")

(21.18" x 8.39" x 3.98")

Model F/XT PC Keyboard

486mm x 196mm x 34mm

(19.13" x 7.72" x 1.34")

(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")

(20.28" x 9.06" x 1.26")

The length measurement includes the riser feet handles. Excluding them, the keyboard is 484mm long.

Model F 4704 Model 300 Expanded Alphameric Keyboard

423mm x 178mm x 29mm

(16.65" x 7.01" x 1.14")

(16.65" x 7.01" x 1.14")

Model M Enhanced Industrial Keyboard, Model M Enhanced Terminal Keyboard, Model M Enhanced PC Keyboard

487mm x 207mm x 47mm

(19.17" x 8.15" x 1.85")

(19.17" x 8.15" x 1.85")

Model M Type I 122-key Terminal Keyboard, Model M Type II 122-key Terminal Keyboard

558mm x 229mm x 64mm

(21.97" x 9.02" x 2.52")

(21.97" x 9.02" x 2.52")

Model M Space Saving Keyboard, Model M Industrial Space Saving Keyboard

406mm x 190mm x 58mm

(15.98" x 7.48" x 2.28")

(15.98" x 7.48" x 2.28")

Model M Type III 122-key Terminal Keyboard, Model M Type IV 122-key Terminal Emulator Keyboard

526mm x 212mm x 51mm

(20.71" x 8.35" x 2.01")

(20.71" x 8.35" x 2.01")

Model M1 Selectric Touch Keyboard, Model M2 Selectric Touch Keyboard, Model M2 Terminal Keyboard

451mm x 158mm x 38mm

(17.76" x 6.22" x 1.5")

(17.76" x 6.22" x 1.5")

Model M3 Numeric Keypad

91mm x 121mm x 38mm

(3.58" x 4.76" x 1.5")

(3.58" x 4.76" x 1.5")

Model M4 Space Saver Keyboard, Model M4-1 Space Saver TrackPoint II Keyboard

330mm x 60mm x 38mm

(12.99" x 2.36" x 1.5")

(12.99" x 2.36" x 1.5")

Model M4 Space Saver Numeric Keypad, Model M4-1 Space Saver Numeric Keypad

92mm x 60mm x 38mm

(3.62" x 2.36" x 1.5")

(3.62" x 2.36" x 1.5")

Model M13 TrackPoint II Keyboard, Model M13 TrackPoint II/FSR Industrial Keyboard

487mm x 207mm x 47mm

(19.17" x 8.15" x 1.85")

(19.17" x 8.15" x 1.85")

Model M 5576-C01 TrackPoint II Keyboard, Model M EnduraPro Keyboard, Model M SpaceSaver Keyboard

455mm x 180mm x 50mm

(17.91" x 7.09" x 1.97")

(17.91" x 7.09" x 1.97")

"Model M-e" PS/2 ANPOS Keyboard

437mm x 200mm x 24mm

(17.2" x 7.87" x 0.94")

(17.2" x 7.87" x 0.94")

The depth measurement includes a pointing device module. Excluding one, the depth is 167mm (6.57").

"Model M-e" MCANPOS Keyboard

340mm x 248mm x 24mm

(13.39" x 9.76" x 0.94")

(13.39" x 9.76" x 0.94")

The depth measurement includes a pointing device module. Excluding one, the depth is 215mm (8.46").

New Model M Space Saving Full-Sized Keyboard

476mm x 188mm x 50mm

(18.74" x 7.4" x 1.97")

(18.74" x 7.4" x 1.97")