A "seamed" edge is one that has been lightly sanded to remove any sharp burrs. Glass with a seamed edge is safe to handle but is not decorative. The seamed edge is recommended for all applications in which the edges of the glass are not exposed. For example, if your glass will be installed into the frame of a window, fireplace door, curio cabinet, etc. and no one will see the edges once the glass has been installed, a seamed edge is all you need. For shelves, table tops, or the like, you may want to consider upgrading to a more finished/decorative edge, such as pencil polished, beveled, etc.