Metal grilles Miscellaneous, Ref: 2111
Details of Miscellaneous
These old floor grilles came from a large house in Bearsden a while ago and all I can say is that there are about a dozen of them and they are all a different size AND some of them have a wider border down one edge. That said, they can be pretty useful things and they would be expensive to cast nowadays as each square section would have to have a little square of casting sand in order to make the mould, and thats fiddly.
A kind of average size would be 6 inches by 27.