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
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"
Keyboards
Scale: 1 pixel = 0.667mm
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)
325mm x 167mm x 47mm - 12.8" x 6.57" x 1.85"
Sources: [ASK-M]
IBM 4704 Model 200 Alphameric Keyboard (Model F)
357mm x 178mm x 29mm - 14.06" x 7.01" x 1.14"
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
410mm x 235mm x 100mm - 16.14" x 9.25" x 3.94"
Sources: [3]
IBM 4704 Model 300 Expanded Alphameric Keyboard (Model F)
423mm x 178mm x 29mm - 16.65" x 7.01" x 1.14"
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]
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]
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)
455mm x 180mm x 50mm - 17.91" x 7.09" x 1.97"
Sources: [4]
IBM 5281/5282/5285/5286 Data Station Typewriter Keyboard
485mm x 235mm x 100mm - 19.09" x 9.25" x 3.94"
Sources: [3]
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.
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)
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.
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]
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)
558mm x 229mm x 64mm - 21.97" x 9.02" x 2.52"
Sources: [5]
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]
Sources
ASK-M. Admiral Shark's Keyboards original measurement. Assume ± 1mm (length) or ± 10g (mass) accuracy.
- Toshiba - Toshiba POS Keyboards Technical Specifications [accessed 2022-04-06].
- Unicomp - Mini M [accessed 2023-04-17]. License/note: retrieved via Wayback Machine (2023-04-17 capture).
- IBM - IBM 5280 Distributed Data System Planning and Site Preparation Guide (#GA21-9351-2) [accessed 2025-07-28]. License/note: document archived by bitsavers.
- Unicomp - Ultra Classic Large Font Black / Brilliant White [accessed 2025-07-26]. License/note: retrieved via Wayback Machine (2025-07-08 capture).
- Brandon @ ClickyKeyboards - 1984 IBM Model F keyboard (6110668) 13 DEC 84 (122-key) [accessed 2025-07-26].
- 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.