Available in 4", 6", 8", 10" and 12" finished sizes. 

The 6", 8", 10" and 12" blocks are packaged with 12 - Unit 1 triangles and 12 - Unit 2 Triangles

The 4" blocks care packaged with  18 - Unit 1 triangles and 18 - Unit 2 Triangles

Cutting instructions and foundations included.  

The 3rd image is of one potential layout using 3 - Unit 1 and 3 - Unit 2 blocks.