The ornament (found here) is a 3 inch tall ceramic disk. One side of the ornament features the Slytherin Crest. The other side has a portrait of Professor Snape. The ornament hangs from your Christmas tree on a gold cord.
Prior purchasers of the Slytherin Crest ornament have written:
Love this ornament! Severus Snape is my favorite character so I was thrilled to find this ornament. It’s made very well and it looks great.
Purchased as a Christmas Ornament but still hangs will continue to hang in my daughters bedroom all year long!