I bought these blocks new at Brock and White in Edmonton before realizing they were larger than what I needed. They've been sitting around for a couple of years. They are new Seves glass block and are end blocks for making a finished end of row as seen in the photo of the shower wall I made. They are unbelievably expensive and I think I paid around $56.00 each for them but you can have them for $20 each. They measure 3 1/8" thick by 7 3/4" square. I'm in Bowser, in Deep Bay.