Hand of Glory has dated this piece to the 19th Century.

45cm high (with open jaw), 37cm wide, 35cm deep.
See this link for a similar example in the British Museum : http://www.britishmuseum.org/explore/highlights/highlight_objects/asia/m/mask_of_a_shishi.aspx
Hand of Glory has dated this piece to the 19th Century.
Decorative antiques & interiors
You can view the stock and full dealer information on the Hand of Glory Profile Page