💚 3/$15 Billabong Halter Tunic Dress

What constitutes vintage these days? Is there a standard definition, like anything over 15 years old is vintage? This maybe vintage Y2K halter tunic dress saw the actual era and lived to tell the tale. It has a very subtle tie dye job and I love the bodice with the half circle detail. It’s a size small but it fits more like an xsmall and can go up to a small.