The shaped floor tiles are ginger brown, and interlocking, I bought the originals in 1985. I am now refitting the kitchen and require some for infilling. They came in boxes of 40 and the size given on the box was 6.5 x 7.75 inches. a photo for idetification is available.

We are putting peel and stick tiles in a basement bathroom floor. We have heard that peel and stick does not stay down on cement, so we want to know if we can glue it.
What else do we need to do to make it stay down and stay tightly sealed between ( the tiles seem to gap after a while) the tiles?