There are 12.5 full-size blocks per m².
There are 2.5 full-length (400mm) blocks per lineal metre.
There are 5 courses (200mm) per vertical metre.
There are 24.3 Twinbricks per m² and 48.6 standard-size bricks per m².

For:

Mortar Mixes

Mortar Joints

Core Fill