Block dimensions:12″HIGH X 17″LONG X 4″THICK
Blocks
A much bigger block with a cavity/hole going through the center.
Bags
An empty big bag.
Quarry Products
A tonne bag of sand.
Concrete block that weighs one tonne.
Gravel
Aggregate mix
An empty small bag.
Regular sized blocks used for most building jobs.
4" clean large stone
2" clean medium sized stone
The bigger thicker blocks up from the 4"
Regular 4" block with a 90 degree offset.