blocks are approximately 7 3/4" from top to bottom, dimensions of the transition piece (top) are height 4" and depth 3 1/4". purchase price is for 5 INSIDE CORNER BLOCKS. These have fabricated to use with moulding up to 4 3/4", they are much different than the standard home depot block (for ) in that i've used an Alexandria colonial 4 1/2" moulding in the tear drop for added detail. See listing photos for specification, these have also been primed with Zinsser 123 stain blocker and painted two coats with Benjamin Moore super white semi-gloss paint! I also have bare pine if necessary, block is pictured with 4 1/2" crown moulding. I also have the MIDDLE transition block which bridges two pieces of crown IN LIEU OF AN UGLY SCARF JOINT as depicted in the latter photos. I also have outside corners! These can also be fabricated with standard shaped moulding for any size transition instead of the colonial shape! e-mail me with quantity of each needed and I will create a listing for you.