Dimensions:  8 inches tall, and 3 x 3 square.  The interesting thing about this piece--is that the lid has been custom cast, using a specially made mold.  It has 4 holes in the top, and ridges on the bottom to keep it in place on the vase. Additionally, when you place long-stemmed flowers through those holes, the flower stems add to keeping the lid in place. I have seen these lids done in metal, but thought that the beautiful colors of glass would make this vase of flowers much more interesting.  Lovely, in fact.  This particular lid will fit any size 3 x 3 square vase.  I can sell it with a smaller 3 inch tall vase, for $18. These lids can be made in any colors.  Right now, I have one which is yellow and orange, another teal and cobalt, one which is green and white, and the fourth in blue and white.  Interesting pieces!!