\documentclass{article}
\usepackage{dsfont}
\begin{document}\Huge
\[
\mathds{N}=\{0,1,2,\ldots\}
\]
\[
\mathds{N}\subset\mathds{Z}\subset\mathds{Q} 
\subset\mathds{R}\subset\mathds{C}
\]
\end{document}