All Black Gothic Witch Halloween Party Costume. Rock the classic look for Halloween with this gothic costume idea. This Gothic Witch costume for women will get you into the Halloween spirit this year. The black dress is slit just up past the knee and comes with a matching witch hat and belt. Dress up in this great look for parties, trick-or-treating and other Halloween festivities! This unique witch costume is a perfect choice for your Halloween outfit. Add a broom and shoes to complete your look! Buy this Now Only $24.56 for Gothic Witch Halloween Party Costume. Use coupon code: EVIL3 at checkout.