Floor length green sequins halter gown

Floor length green sequins gown with halter top, very high front slit and train. This dress is without label but I'm pretty sure it's from BCBG Max Azria. Not 100% sure of the size, as the label is gone but my guess is it's a size 4 or 6. Only worn once and in excellent condition. Heavy black inner lining makes the dress wearable without a bra and underwear lines non existent.