2 layers275.5 × 105.6 mm

ULK
Goga64/ULK
Low profile split keyboard with Corne 42 Layout and Cerry ULP switches. (6mm height)
124 parts58MIT
KiCad boards from 1 GitHub repository tagged “ultra-low-profile”, the most starred first; open any of them in PCBKit.

Goga64/ULK
Low profile split keyboard with Corne 42 Layout and Cerry ULP switches. (6mm height)

Goga64/ULK
Low profile split keyboard with Corne 42 Layout and Cerry ULP switches. (6mm height)

Goga64/ULK
Low profile split keyboard with Corne 42 Layout and Cerry ULP switches. (6mm height)