Hi Alan,I'm so sorry for the late reply, I'm not surer how we missed your comment. I'm sure it's probably too late, however they're Bluestone coping tiles with a 75mm drop face. These are available in many different sizes, however i'd be guessing that these were 1000x400mm.
Need Critique & Criticism with design and layout
Feedback on floor plan for new build
Help with floorplan for big home reno/extension please?
Designing house to fit on small building envelope