Closer Slanted Parallel Symbol
Answer : Raise and scale. \documentclass{article} \usepackage{amsmath,graphicx} \makeatletter \newcommand{\newparallel}{\mathrel{\mathpalette\new@parallel\relax}} \newcommand{\new@parallel}[2]{% \begingroup \sbox\z@{$#1T$}% get the height of an uppercase letter \resizebox{!}{\ht\z@}{\raisebox{\depth}{$\m@th#1/\mkern-5mu/$}}% \endgroup } \makeatother \begin{document} $AB\newparallel CD$ $\scriptstyle AB\newparallel CD$ \end{document} A different implementation with picture mode. One can easily vary the slope by acting on the second argument to \mathpalette . \documentclass{article} \usepackage{amsmath,pict2e} \makeatletter \newcommand{\newparallel}{\mathrel{\mathpalette\new@parallel{0.3}}} \newcommand{\new@parallel}[2]{% \begingroup \settoheight{\unitlength}{$#1T$}% get the height of an uppercase letter \sbox\z@{\new@parallel@slash{#1}{#2}}% \mkern0.5mu\copy\z@\mkern-0.5mu\copy\z@\mkern0.5mu \endgroup } \newcommand{\new@parallel@slash}[2]{% \begin{p...