amsmath matrix environments The amsmath package provides commands to typeset matrices with different delimiters. Once you have loaded \usepackage{amsmath} in your preamble, you can use the following environments in your math environments: Type LaTeX markup Renders as Plain \begin{matrix}1 & 2 & 3\\a & b & c\end{matrix} $$\begin{matrix}1 & 2 & 3\\a & b & c\end{matrix}$$ Parentheses;round brackets \begin{pmatrix}1 & 2 & 3\\a & b & c\end{pmatrix} $$\begin{pmatrix}1 & 2 & 3\\a & b & c\end{pmatrix}$$ Brackets;square brackets \begin{bmatrix}1 & 2 & 3\\a & b & c\end{bmatrix} $$\begin{bmatrix}1 & 2 & 3\\a & b & c\end{bmatrix}$$ Braces;curly brackets \begin{Bmatrix}1 & 2 & 3\\a & b & c\end{Bmatrix} $$\begin{Bmatrix}1 & 2 & 3\\a & b & c\end{Bmatrix}$$ Pipes \begin{vmatrix}1 & 2 & 3\\a & b & c\end{vmatrix} $$\begin{vmatrix}1 & 2 & 3\\a & b & c\end{vmatrix}$$ Double pipes \begin{Vmatrix}1 & 2 & 3\\a & b & c\end{Vmatrix} $$\begin{Vmatrix}1 & 2 & 3\\a & b & c\end{Vmatrix}$$ If you need to create matrices with different delimiters, you can add them manually to a plain matrix. For example: LaTeX markup Renders as \left\lceil\begin{matrix}1 & 2 & 3\\a & b & c\end{matrix}\right\rceil $$\left\lceil\begin{matrix}1 & 2 & 3\\a & b & c\end{matrix}\right\rceil$$ \left\langle\begin{matrix}1 & 2 & 3\\a & b & c\end{matrix}\right\rangle $$\left\langle\begin{matrix}1 & 2 & 3\\a & b & c\end{matrix}\right|$$ Inline matrices When typesetting inline math, the usual matrix environments above may look too big. It may be better to use smallmatrix in such situations, although you will need to provide your own delimiters. \documentclass{article} \usepackage{amsmath} \begin{document} \noindent Trying to typeset an inline matrix here: $\begin{pmatrix} a & b\\ c & d \end{pmatrix}$, but it looks too big, so let's try $\big(\begin{smallmatrix} a & b\\ c & d \end{smallmatrix}\big)$ instead. \end{document}  Open this smallmatrix example in Overleaf The following image shows the output produced by the example above: The mathtools package provides psmallmatrix, bsmallmatrix etc environments for convenience. Further reading Mathematical expressions Brackets_and_Parentheses Aligning equations with amsmath Display style in math mode The not so short introduction to LaTeX2ε amsmath package documentation mathtools package documentation