"Seamed" edges are sanded down so they aren't sharp (best for frames). "Polished" edges are shiny and meant to be seen.
Many carry thicker mirror stock suitable for frames. where to buy mirror glass cut to size
Acts as a marketplace to connect you with local installers or ship direct. "Seamed" edges are sanded down so they aren't
Often "while you wait" for small, simple cuts. 💡 Pro-Tips for a Perfect Fit where to buy mirror glass cut to size