It depends on what type of blocks, and the sizes of the blocks.
a tall block is something like a HDB flat
Rory Block is nine feet sixteen inches tall.
Dan Block is 5' 11".
Darren Block is 6' 7".
Hunt Block is 6' 3".
Jacob Block is 6' 1".
Kirsten Block is 170 cm.
Louis Block is 5' 5".
Machi Block is 6' 2".
Michelle Block is 162 cm.
Taylor Block is 5' 5".
20m