Hej welkommen~ These are 860x440. That's two 400x400 squares with a 20px gap and margin. That's 72 by 37 mm, if you round to floor.

It is meant as a kind of continuation of the monochrome 204x94 and the tiny 88x31 image series.

Some tools created on the way: halftype, jpeg glitch, flowycel (CW flashing)