I had a plumbing problem in my new (44 yr. old) home and they had to
remove four on the tiles around the commode with a jackhammer.  The
tile is Sylvan Grey by Laufen International Tile Company.  The
previous owners had one tile 12x12 along with three of the smaller 2x2
grey tiles that fit in the corners.  Because of the mitered corner on
each tile, trying to find something to match it has been a problem as
well as trying to match the color.  It  is almost an off white with
faint swirls of grey.  There are two sets of numbers on the box if
that would be of any assistance.  The previous owners probably
remodeled the bathroom ten or eleven years ago and they bought the
tile at American Tile Co. in Hurst, TX.  However, it has been
discontinued and they were no help whatsoever.

We used to have this. Medici & Medici Royale were dropped a LONG time
ago. Sadly, I don't have any left, but here's a suggestion for you.
Tile Mart, in Benton Harbor, Michigan is known to buy "drops" from
Laufen & is probably the only place that would have any of this left.
The last phone # I have for them is:
1-269-925-0629
Hope this helps!
Mid America Tile