This is the Official Wallpaper 03 of 15 for Samsung Galaxy S9 and Samsung Galaxy S9+ with dark grey color of number 9. Similarly with previous wallpapers, this wallpaper also featured with 1440×2960 pixels resolution. This resolution is perfect for both S9 and S9+.
Samsung Galaxy S9 has 5.8″ screen size with 147.7 x 68.7 x 8.5 mm dimensions and 163 g (5.75 oz) weight. While S9+ has 6.2″ screen size with 158.1 x 73.8 x 8.5 mm (6.22 x 2.91 x 0.33) in dimensions and 189 g (6.67 oz) weight.
I have a lot of wallpapers for your smartphones. Below pictures are all 15 wallpapers for Samsung Galaxy S9 and Samsung Galaxy S9+: