Split face (two long edges)., Rock face (one long edge).

Rock face.

50 mm (height) x 150 mm (depth)., 50 mm (height) x 200 mm (depth)., 50 mm (height) x 250 mm (depth)., 50 mm (height) x 300 mm (depth).

400 mm (length) x 50 mm (height) x 400 mm (depth)., 450 mm (length) x 50 mm (height) x 450 mm (depth)., 520 mm (length) x 50 mm (height) x 520 mm (depth)., 550 mm (length) x 50 mm (height) x 550 mm (depth).

Rectangle.

Square.