documentclass{article}
usepackage{color}
newcommandannulus{raisebox{0.5ex}{%
  makebox[0.5em]{rlap{circle*{5}}textcolor{white}{circle*{3}}}}}
begin{document}

foo annulus bar

end{document}

documentclass[12pt]{article}
usepackage[usestackEOL]{stackengine}
usepackage{graphicx}
usepackage{tikz}
newcommand{radiobutton}{raisebox{-.5pt}{scalebox{.8}{begin{tikzpicture}
draw [thick, draw=red,fill=red](0,0) circle (1.5mm);
draw [thick, draw=red, fill=white](0,0) circle (1.2mm);
end{tikzpicture}}}}
begin{document}
aradiobutton b
end{document}