Block size is calculated by the following formula.

Block size is calculated by the following formula.

A.
Number of stored sparse dimension members multiplied together times 8 bytes

B.
Number of total sparse dimension members multiplied together times 8 bytes

C.
Number of stored dense dimension members multiplied together times 8 bytes

D.
Number of total dense dimension members multiplied together times 8 bytes

Explanation:
http://www.exforsys.com/forum/data-warehousing/96809-hyperion-essbase.html#9