Commutative diagrams side by side

Question

I would like to set these diagrams side by side. Any help would be appreciated.

{\Large$$
\begin{tikzcd}
X\arrow{r}{i}\arrow[swap]{dr}{j} & M \arrow{d}{j'}\\
& N
\end{tikzcd}
$$}

and

{\Large$$
\begin{tikzcd}
X\arrow{r}{j}\arrow[swap]{dr}{i} & N \arrow{d}{i'}\\
& M
\end{tikzcd}
$$}

Answer 1

Is this what you mean?

\documentclass{article}
\usepackage{tikz-cd}
\begin{document}
[
\begin{tikzcd}
X\arrow{r}{i}\arrow[swap]{dr}{j} & M \arrow{d}{j'}\
& N
\end{tikzcd}\hspace{1cm}
\begin{tikzcd}
X\arrow{r}{j}\arrow[swap]{dr}{i} & N \arrow{d}{i'}\
& M
\end{tikzcd}
]
\end{document}

Answer 2

If you really insist on \Large (but you shouldn't), define your own environment. And it's better to use the “modern” syntax for arrows.

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz-cd}
\newsavebox{\tikzcdbox}
\newenvironment{Largetikzcd}
 {\begin{lrbox}{\tikzcdbox}\Large\begin{tikzcd}}
 {\end{tikzcd}\end{lrbox}\usebox{\tikzcdbox}}
\begin{document}
[
\begin{Largetikzcd}
X \arrow[r,"i"] \arrow[dr,swap,"j"] & M \arrow[d,"j'"] \
& N
\end{Largetikzcd}
\qquad
\begin{Largetikzcd}
X \arrow[r,"j"] \arrow[dr,swap,"i"] & N \arrow[d,"i'"] \
& M
\end{Largetikzcd}
]
[
\begin{tikzcd}
X \arrow[r,"i"] \arrow[dr,swap,"j"] & M \arrow[d,"j'"] \
& N
\end{tikzcd}
\qquad
\begin{tikzcd}
X \arrow[r,"j"] \arrow[dr,swap,"i"] & N \arrow[d,"i'"] \
& M
\end{tikzcd}
]
\end{document}

Never use $$ in a LaTeX document environment.