How to limit the figure caption width?

Question

Figure captions seem to wrap at the page width. How could I make them wrap at the figure width instead? Currently, they can easily be mistaken for normal text.

\begin{figure}[!htb]
    \begin{center
    \begin{tikzpicture} ... \end{tikzpicture}
    \caption{Caption goes here.}
    \end{center}
\end{figure}

Answer 1

The caption package provides many enhancements: for example

\usepackage[margin=1cm]{caption}

Reducing the caption to the figure width seems not a good idea in general, particularly if a couple of figures are on the same page or on facing pages. On the other hand reducing the width and maybe the font size can be a good typographical device to isolate them better from the context.

Answer 2

in caption package guide:

Only fixed widths are supported here; if you are looking for a way to limit the width of the caption to the width of the figure or table, please take a look at the floatrow[8] or threeparttable[22] package.

\documentclass{article}
\usepackage{floatrow}
\begin{document}

\begin{figure}
\ffigbox[\FBwidth]
{\caption{caption text caption text caption text caption text 
caption text caption text caption text caption text 
caption text caption text caption text caption text }\label{...}}
{\rule{50mm}{20mm}}
\end{figure}

\end{document}