\environment xits-env

\usemodule[fnt-25]

\startbuffer[THEFORMULA]
   \hat{a}\qquad \widehat{a}\qquad
   \hat{aaa}\qquad \widehat{aaa}\qquad
   \hat{aaaaaaaa}\qquad \widehat{aaaaaaaa}
\stopbuffer

\starttext

$\getbuffer[THEFORMULA]$

\blank

\showmathfontcharacters[][0x2C6,0xFE302]

\stoptext