Dining fixtures are normally 60" above the finished floor which leaves 30" between bottom of chandelier and the table. This allows for a centerpiece below the fixture. Your table is not long enough to have any choices about where to put the recessed fixtures. Put them where they clear the chandelier diameter. Don’t put them over the heads of people seated at the ends of the table. They need to be in front of seated guests. Because of the crowding 4" fixtures might be best.