This listing is for a Spider Brooch. I'm not an expert, from research it appears to be Navajo artist Herman Coan or his wife.
The spider is in good used condition with no issues. I don't recommend bending the legs back too many times, as with any metal when you bend it back and forth, it will eventually break off. Please look at last picture for dimensions. I have other Halloween jewelry and Native American listed also. Please check my store out where I have lots of jewelry listed or add me to your favorites and visit later.