Skip to content
Preview. The current manual is at svalboard.com/manual.

Sizing before you build

Print your keys to fit your fingertips. Measure first, then print (Step 1).

Svalboard is most comfortable with the keys as close to your fingers as possible, without being so close that you press keys by accident.

  1. Print the fingertip sizer at 100%, with no scaling: svalboard.com/sizer.
  2. Place each fingertip in the crescents. Find the smallest crescent where your fingertip width at the bottom line is the same as the line, or slightly smaller.
  3. Write down the width for each finger in the table on the sizer.
  4. Pick the key size that fits your largest fingertip.

The sizer measures fingertip width 6 mm from the tip. That is the depth of a finger cluster, from the center key surface to the edge of the side keys.

The Svalboard fingertip sizer: crescents from 14 mm to 20 mm wide, a fingertip drawn in the 14 mm crescent, and a table to record the width of each finger.

There are four side key sizes. In order of increasing fingertip space:

Size Spacing
Thick 16 mm
Semi 17 mm
Thin 18 mm
Backset 20 mm
  • People with thin or pointed fingertips may prefer the thicker keys.
  • People with blunt or wide fingertips may need the Backset keys for enough room to type comfortably.
  • North keys come in Thick only.

The spacing is the minimum distance between the keys, measured at the top of the center key.

Side views of the Thick, Thin and Backset side keys.

Top views of finger clusters with Thick, Thin and Backset keys. The yellow line marks the width at the top (17, 19 and 21 mm) and the white line the width at the bottom (15, 17 and 19 mm).

Svalboard’s creator has slightly wide ring fingertips and uses the Thick keys without a problem. The Thin keys work for him too.

Only fingertip width calls for different parts. Every Svalboard has plenty of adjustment range for the rest. Hand size can help you pick a trackball size:

  • Hand length, wrist to the tip of the middle finger: under 170 mm is extra small, 170 mm small, 180 mm medium, 190 mm large, over 195 mm extra large.
  • Palm width at the knuckles: under 75 mm is small, 75 to 85 mm medium, over 85 mm large.

44 mm is the default trackball size. A 55 mm ball only fits very large hands. See Trackballs and static bearings.

An example hand with its measurements: whole hand 180 mm, thumb to index 65 mm, index to middle 15 mm, middle to ring -9 mm, ring to pinky -28 mm, palm width at the knuckles 76 mm, and last thumb knuckle 30 mm.