The F sharp minor eleventh chord is a 6-note chord consisting of the notes F#, A, C#, E, G# and B.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as F#m11.
Interactive piano diagram for the F sharp minor eleventh chord
Chords that are a subset of F#m11. These contain less notes but all of them are included in F#m11.