44 rounds, square. The pattern starts with 8 pattern repeats per round, then switches to 4 pattern repeats per round in the outer portion.
This is the square doily of a 3-piece set. The hexagon is 418/32 and the octagon is 418/33.
The size is given as 22.5 x 22.5 cm, but the thread and needle size used to achieve that size are not indicated.
The designer is specifically listed as H. Niebling.