German Kitchen with Boxing and Island Bulkhead.

[snezza]

The studwork timber around the tall bank of units was 44mm x 44mm CLS.
 It didn't need to be any bigger as it's not holding any weight other than itself and is supported by the units themselves.

The elongated hole is actually a recessed plaster light fitting. There are a number of the same fittings set at the same height all around the various rooms at ground level. The plaster fitting is about 200mm wide x 750mm high, but by the time it's all plastered in, filled, sanded down and painted, the recess you can see is about 80mm wide x 500mm high. I suppose you could call it Ambient or Mood Lighting....!