<
centering a table >
footnote within a table
fixed width
How to create a table in LaTeX with fixed width?
generate LaTeX tables with fixed width online
Problem
If the default tabular environment is used, every colunm get the width they need. This could lead to extra wide tables or to a bad looking if the width differs between the rows.
Solution
One solution is to use the p-parameter of the tabular environment. This has the disadvantage that the cells could only be in justify format.
Example
\documentclass{article}
\begin{document}
\begin{tabular}{|p{1cm}|p{2cm}|p{3cm}|}
\hline
1 cm width & 2 cm width & 3 cm width \\
\hline
test 1 & test 2 & test 3\\
\hline
\end{tabular}
\end{document}
Output:
Hint
The alignment of the cells could be changed by using the package tabularx and define three new row-types:
flush left fixed width:
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}}
center fixed width:
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
flush right fixed width:
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}}
example 2
\documentclass{article}
\usepackage{tabularx}
\begin{document}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}}
\begin{tabular}{|L{1cm}|C{2cm}|R{3cm}|}
\hline
1 cm width & 2 cm width & 3 cm width \\
\hline
test 1 & test 2 & test 3\\
\hline
\end{tabular}
\end{document}
output: