I purchased the above hone, and sliced into four pieces. It is about 1/2" thick and about 2" x 4" in honing surface. (The back side has saw marks, is not entirely flat, and is not suitable for honing.)
This is not a full size Chinese 12K (C12K) hone. If you can afford the current price at Woodcraft (or other vendor sites) for the full size hone, you should buy it.