Introduction to matrices

What are the dimensions of the following matrix $D_{?,?} = \begin{pmatrix} 2 & 2 & 2 & 0 & 2 & 0 \\ 2 & 2 & 2 & 0 & 2 & 0 \\ 2 & 2 & 2 & 0 & 2 & 0 \end{pmatrix}$?

Please spell out your answer, for example: "five by three". Enter the solution without quotes.