Tried the printlen package, but it seems to not understand what 2.5in means:

```
\documentclass{minimal} 
\usepackage{printlen} 
\uselengthunit{in} 
\begin{document} 
\newlength{\advertwidth} 
\setlength{\advertwidth}{2.5in} 
\printlength{\advertwidth} 
\end{document} 

```

Typesetting the above yields `2.50049 in` --- is there something better?

NB - in addition to the above, the project in question needs the packages: 

```
\usepackage{calc,geometry,xcolor,graphicx,csvsimple}

```

the last in particular, conflicts w/ the answers initially provided.