It is called a 2" block, I should have read more carefully because it does say in the description 2 3/8" block.
I was hoping for a 2" block, but I am happy to have it- the 1/4" gridlines I haven't seen on other blocks and it has the nice thick 9/16" with grooves to hold.
Great block. I need to read better. :-) It is almost the same size as my 2.5" block.