Units - The length of each cap is determined by “units”. Shown as the number of units followed by a “u” most of the time. All the alphabetical caps are 1u.

Standard Sizes on ANSI Keyboard

Below are the sizes for a standard keyboard layout as a foundation for other layouts you may encounter.

Cap

Row

Unit Length

Stabilizer

Esc

R1

1u

Tab

R2

1.5u

Caps Lock

R3

1.75u

Left Shift

R4

2.25u

Yes (2u)

Left Control

R4

1.25u

Left GUI

R4

1.25u

Left Alt

R4

1.25u

Spacebar

R4

6.25u

Yes (6.25u)

Right Alt

R4

1.25u

Right GUI

R4

1.25u

Right Menu

R4

1.25u

Right Control

R4

1.25u

Right Shift

R4

2.75u

Yes (2u)

Enter

R3

2.25u

Yes (2u)

Backspace

R1

2u

Yes (2u)

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