答案1
只需缩放即可。
\documentclass{article}
% large ops, copied from shuffle font package
\DeclareFontFamily{U}{bigshuffle}{}
\DeclareFontShape{U}{bigshuffle}{m}{n}{
<5-8> s*[1.7] shuffle7
<8-> s*[1.7] shuffle10
}{}
\DeclareSymbolFont{BigShuffle}{U}{bigshuffle}{m}{n}
\DeclareMathSymbol\bigshuffle{\mathop}{BigShuffle}{"001}
\DeclareMathSymbol\bigcshuffle{\mathop}{BigShuffle}{"002}
% binary ops, for comparasion only
\usepackage{shuffle}
\begin{document}
\[
a\shuffle b, x \cshuffle y
\]
\[
\bigshuffle_i a_i, \bigcshuffle_{j=1}^n x_j
\]
\end{document}