Keyboard Sizes & Dimensions

Notice 2025-07-28

The Keyboard Sizes & Dimensions topic is currently undergoing a revamp. This page's appearance is subject to significant changes over the next few weeks.

A list of physical dimensions for various IBM and family keyboards.

Keypads

Scale: 1 pixel = 1.25mm

A photo of an IBM Numeric Keypad for IBM PS/2 L40 SX
91mm
121mm

IBM Numeric Keypad for IBM PS/2 L40 SX (Model M3)

91mm x 121mm x 38mm - 3.58" x 4.76" x 1.5"

A photo of an IBM Space Saver Numeric Keypad
92mm
160mm

IBM Space Saver Numeric Keypad (Model M4/M4-1)

92mm x 160mm x 38mm - 3.62" x 6.3" x 1.5"

A photo of an IBM Screen Reader Keypad
152mm
190mm

IBM Screen Reader Keypad (Model M)

152mm x 190mm x 38mm - 5.98" x 7.48" x 1.5"

Keyboards

Scale: 1 pixel = 0.667mm

A photo of an IBM 4704 Display Station Model 100 Function Keyboard
281mm
178mm

IBM 4704 Model 100 Function Keyboard (Model F)

281mm x 178mm x 29mm - 11.06" x 7.01" x 1.14"

A photo of an IBM Retail POS Keyboard w/ Card Reader
325mm
167mm

IBM Retail POS Keyboard (Model M7/M7-1) & Modular 67-Key POS Keyboard (Model M7-e)

325mm x 167mm x 47mm - 12.8" x 6.57" x 1.85"

Sources: [ASK-M]

A photo of an IBM Space Saver Keyboard
330mm
160mm

IBM Space Saver Keyboard (Model M4/M4-1)

330mm x 160mm x 38mm - 12.99" x 6.3" x 1.5"

Sources: [ASK-M]

A photo of an IBM Modular CANPOS II Keyboard
340mm
248mm

IBM Modular CANPOS II Keyboard (Model M-e)

340mm x 248mm x 51mm - 13.39" x 9.76" x 2.01"

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

Sources: [1][ASK-M]

A photo of an IBM 4704 Model 200 Alphameric Keyboard
357mm
178mm

IBM 4704 Model 200 Alphameric Keyboard (Model F)

357mm x 178mm x 29mm - 14.06" x 7.01" x 1.14"

A photo of a Unicomp Mini Model M
395mm
190mm

Unicomp Mini Model M

395mm x 190mm x 50mm - 15.55" x 7.48" x 1.97"

Sources: [2][ASK-M]

A photo of an IBM PS/2 Space Saving Keyboard
406mm
190mm

IBM Space Saving Keyboard (Model M)

406mm x 190mm x 58mm - 15.98" x 7.48" x 2.28"

A photo of an IBM 5281 Data Station and its Data Entry Keyboard
410mm
235mm

IBM 5281/5282/5285/5286 Data Station Data Entry Keyboard

410mm x 235mm x 100mm - 16.14" x 9.25" x 3.94"

Sources: [3]

A photo of an IBM 4704 Model 300 Expanded Alphameric Keyboard
423mm
178mm

IBM 4704 Model 300 Expanded Alphameric Keyboard (Model F)

423mm x 178mm x 29mm - 16.65" x 7.01" x 1.14"

A photo of an IBM Modular 67-Key POS Keyboard with LCD Display
435mm
167mm

IBM Modular 67-Key POS Keyboard with LCD Display (Model M8-e)

435mm x 167mm x 49mm - 17.13" x 6.57" x 1.93"

Sources: [1][ASK-M]

A photo of an IBM Retail POS Keyboard w/ Card Reader and Display
437mm
167mm

IBM Retail POS Keyboard w/ Card Reader and Display (Model M8)

437mm x 167mm x 47mm - 17.2" x 6.57" x 1.85"

The height measurement was taken when the LCD is lowered. When it is up, the height can increase to 571mm (2.3").

Sources: [ASK-M]

A photo of an IBM USB Retail ANPOS Keyboard w/ MSR
437mm
167mm

IBM Retail ANPOS Keyboard w/ Card Reader (Model M9) & Modifiable Layout Keyboard (Model M11)

437mm x 167mm x 49mm - 17.2" x 6.57" x 1.93"

Sources: [ASK-M]

A photo of an IBM Modular ANPOS II Keyboard
437mm
200mm

IBM Modular ANPOS II Keyboard (Model M9-e)

437mm x 200mm x 49mm - 17.2" x 7.87" x 1.93"

The depth measurement includes the pointing device protrusion. Excluding it, the depth is 167mm (6.57").

Sources: [1][ASK-M]

A photo of an IBM Easy OPTIONS 101-Key Extended Keyboard
451mm
158mm

IBM Selectric Touch Keyboard (Model M1/M2)

451mm x 158mm x 38mm - 17.76" x 6.22" x 1.5"

A photo of a Unicomp EnduraPro
455mm
180mm

Unicomp EnduraPro, SpaceSaver M & Ultra Classic (Model M)

455mm x 180mm x 50mm - 17.91" x 7.09" x 1.97"

Sources: [4]

A photo of an Unicomp New Model M
476mm
188mm

Unicomp New Model M

476mm x 188mm x 50mm - 18.74" x 7.4" x 1.97"

Sources: [ASK-M]

A photo of an IBM 5281/5282/5285/5286 Data Station Typewriter Keyboard
485mm
235mm

IBM 5281/5282/5285/5286 Data Station Typewriter Keyboard

485mm x 235mm x 100mm - 19.09" x 9.25" x 3.94"

Sources: [3]

A photo of an IBM Personal Computer Keyboard
486mm
196mm

IBM Personal Computer Keyboard (Model F)

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.

A photo of an IBM PS/2 Enhanced Keyboard
487mm
207mm

IBM Enhanced Keyboard, Lexmark Classic Touch Keyboard & Unicomp Classic (Model M)

487mm x 207mm x 47mm - 19.17" x 8.15" x 1.85"

A photo of an IBM 3104-B2/3178-C2 Typewriter Keyboard
491mm
228mm

IBM Base Keyboard (31XX-75 & 31XX-87 type Model F)

491mm x 228mm x 42mm - 19.33" x 8.98" x 1.65"

A photo of an IBM 5291/5292 Display Station Keyboard Unit
515mm
230mm

IBM 5291/5292 Display Station Keyboard Unit (Model F)

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.

A photo of an IBM InfoWindow Twinax Display Station 122-key Typewriter Keyboard
526mm
212mm

IBM 122-key Model M Converged Keyboard (Types 3 & 4)

526mm x 212mm x 51mm - 20.71" x 8.35" x 2.01"

Sources: [ASK-M]

A photo of an IBM 6580 Displaywriter Display Station Type A Keyboard Module
538mm
213mm

IBM 6580 Displaywriter Display Station Type A Keyboard Module (6580 type Model B)

538mm x 213mm x 101mm - 21.18" x 8.39" x 3.98"

A photo of an IBM 3180 Model 2 Display Station Typewriter Keyboard Element
558mm
229mm

IBM 122-key Model F & Model M Converged Keyboard (Types 1 & 2)

558mm x 229mm x 64mm - 21.97" x 9.02" x 2.52"

Sources: [5]

A photo of an IBM 3210 Model 1 Console Printer-Keyboard
780mm
610mm

IBM 3210 Console Printer-Keyboard

780mm x 610mm x 100mm - 30.71" x 24.02" x 3.94"

The height measurement does not include the 3210's printer element

Sources: [6]

A photo of an IBM 3215 Console Printer-Keyboard
790mm
610mm

IBM 3215 Console Printer-Keyboard

790mm x 610mm x 330mm - 31.1" x 24.02" x 12.99"

Sources: [6]

Keyboard
(Notes)
Dimensions
(length x depth x height)
IBM Numeric Keypad for IBM PS/2 L40 SX (Model M3)91mm x 121mm x 38mm
3.58" x 4.76" x 1.5"
IBM Space Saver Numeric Keypad (Model M4/M4-1)92mm x 160mm x 38mm
3.62" x 6.3" x 1.5"
IBM Screen Reader Keypad (Model M)152mm x 190mm x 38mm
5.98" x 7.48" x 1.5"
IBM 4704 Model 100 Function Keyboard (Model F)281mm x 178mm x 29mm
11.06" x 7.01" x 1.14"
IBM Retail POS Keyboard (Model M7/M7-1) & Modular 67-Key POS Keyboard (Model M7-e)
Sources: [ASK-M]
325mm x 167mm x 47mm
12.8" x 6.57" x 1.85"
IBM Space Saver Keyboard (Model M4/M4-1)
Sources: [ASK-M]
330mm x 160mm x 38mm
12.99" x 6.3" x 1.5"
IBM Modular CANPOS II Keyboard (Model M-e)
The depth measurement includes a pointing device module. Excluding one, the depth is 215mm (8.46").
Sources: [1][ASK-M]
340mm x 248mm x 51mm
13.39" x 9.76" x 2.01"
IBM 4704 Model 200 Alphameric Keyboard (Model F)357mm x 178mm x 29mm
14.06" x 7.01" x 1.14"
Unicomp Mini Model M
Sources: [2][ASK-M]
395mm x 190mm x 50mm
15.55" x 7.48" x 1.97"
IBM Space Saving Keyboard (Model M)406mm x 190mm x 58mm
15.98" x 7.48" x 2.28"
IBM 5281/5282/5285/5286 Data Station Data Entry Keyboard
Sources: [3]
410mm x 235mm x 100mm
16.14" x 9.25" x 3.94"
IBM 4704 Model 300 Expanded Alphameric Keyboard (Model F)423mm x 178mm x 29mm
16.65" x 7.01" x 1.14"
IBM Modular 67-Key POS Keyboard with LCD Display (Model M8-e)
Sources: [1][ASK-M]
435mm x 167mm x 49mm
17.13" x 6.57" x 1.93"
IBM Retail POS Keyboard w/ Card Reader and Display (Model M8)
The height measurement was taken when the LCD is lowered. When it is up, the height can increase to 571mm (2.3").
Sources: [ASK-M]
437mm x 167mm x 47mm
17.2" x 6.57" x 1.85"
IBM Retail ANPOS Keyboard w/ Card Reader (Model M9) & Modifiable Layout Keyboard (Model M11)
Sources: [ASK-M]
437mm x 167mm x 49mm
17.2" x 6.57" x 1.93"
IBM Modular ANPOS II Keyboard (Model M9-e)
The depth measurement includes the pointing device protrusion. Excluding it, the depth is 167mm (6.57").
Sources: [1][ASK-M]
437mm x 200mm x 49mm
17.2" x 7.87" x 1.93"
IBM Selectric Touch Keyboard (Model M1/M2)451mm x 158mm x 38mm
17.76" x 6.22" x 1.5"
Unicomp EnduraPro, SpaceSaver M & Ultra Classic (Model M)
Sources: [4]
455mm x 180mm x 50mm
17.91" x 7.09" x 1.97"
Unicomp New Model M
Sources: [ASK-M]
476mm x 188mm x 50mm
18.74" x 7.4" x 1.97"
IBM 5281/5282/5285/5286 Data Station Typewriter Keyboard
Sources: [3]
485mm x 235mm x 100mm
19.09" x 9.25" x 3.94"
IBM Personal Computer Keyboard (Model F)
The length measurement includes the riser feet handles. Excluding them, the keyboard is 456mm long.
486mm x 196mm x 34mm
19.13" x 7.72" x 1.34"
IBM Enhanced Keyboard, Lexmark Classic Touch Keyboard & Unicomp Classic (Model M)487mm x 207mm x 47mm
19.17" x 8.15" x 1.85"
IBM Base Keyboard (31XX-75 & 31XX-87 type Model F)491mm x 228mm x 42mm
19.33" x 8.98" x 1.65"
IBM 5291/5292 Display Station Keyboard Unit (Model F)
The length measurement includes the riser feet handles. Excluding them, the keyboard is 484mm long.
515mm x 230mm x 32mm
20.28" x 9.06" x 1.26"
IBM 122-key Model M Converged Keyboard (Types 3 & 4)
Sources: [ASK-M]
526mm x 212mm x 51mm
20.71" x 8.35" x 2.01"
IBM 6580 Displaywriter Display Station Type A Keyboard Module (6580 type Model B)538mm x 213mm x 101mm
21.18" x 8.39" x 3.98"
IBM 122-key Model F & Model M Converged Keyboard (Types 1 & 2)
Sources: [5]
558mm x 229mm x 64mm
21.97" x 9.02" x 2.52"
IBM 3210 Console Printer-Keyboard
The height measurement does not include the 3210's printer element
Sources: [6]
780mm x 610mm x 100mm
30.71" x 24.02" x 3.94"
IBM 3215 Console Printer-Keyboard
Sources: [6]
790mm x 610mm x 330mm
31.1" x 24.02" x 12.99"

Sources

ASK-M. Admiral Shark's Keyboards original measurement. Assume ± 1mm (length) or ± 10g (mass) accuracy.

  1. Toshiba - Toshiba POS Keyboards Technical Specifications [accessed 2022-04-06].
  2. Unicomp - Mini M [accessed 2023-04-17]. License/note: retrieved via Wayback Machine (2023-04-17 capture).
  3. IBM - IBM 5280 Distributed Data System Planning and Site Preparation Guide (#GA21-9351-2) [accessed 2025-07-28]. License/note: document archived by bitsavers.
  4. Unicomp - Ultra Classic Large Font Black / Brilliant White [accessed 2025-07-26]. License/note: retrieved via Wayback Machine (2025-07-08 capture).
  5. Brandon @ ClickyKeyboards - 1984 IBM Model F keyboard (6110668) 13 DEC 84 (122-key) [accessed 2025-07-26].
  6. IBM - IBM System/360, System/370, 4300, 9370 and ES/9000 Processors Input/Output Equipment Installation Manual - Physical Planning (#GC22-7064-13) [accessed 2025-07-25]. License/note: document archived by bitsavers.