If it is a 777-200 then Space + seats are the old Premium Economy seats at 3-3-3, which also the same as the old Economy seats. No 777-200 has been refitted with the new interiors yet.
If it is a 777-300 then you may ask if you can get the Skycouch seats, so that an adult and child pairing can get one each. You will not get the Skycouch seat belt extensions or matress but you can still extend the legrests to make the Skycouch.