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I have a beamer presentation with some pgfplots graphs and want to increase their thickness. I found this answer How to increase the thickness of the graph lines and remove the point?, but I found ultra thick not thick enough and I do not have enough rep. to comment.

My question is: is there a way to increase the thickness of graph lines to obtain lines larger than with the ultra thick option?

documentclass[10pt]{beamer}



usetheme[progressbar=frametitle, background=dark]{metropolis}

usepackage{appendixnumberbeamer}



usepackage{pgfplots}



usepackage{xspace}

newcommand{themename}{textbf{textsc{metropolis}}xspace}



usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage[english]{babel}



usepackage{amsmath}

usepackage{amssymb}

usepackage{subcaption}

usepackage{tikz}



pgfplotsset{compat=1.8}

usepgfplotslibrary{statistics}



definecolor{darkgreen}{rgb}{0.05,0.5,0.}

definecolor{lightgray}{RGB}{50, 60, 60}

definecolor{pitchblack}{RGB}{0, 0, 0}

definecolor{lightbeige}{RGB}{255, 251, 241}

definecolor{mediumgray}{RGB}{200, 200, 200}



setbeamercolor{background canvas}{bg=pitchblack}

setbeamercolor{normal text}{fg=lightbeige}

setbeamercolor{frametitle}{bg=lightgray, fg=mediumgray}



begin{document}



begin{frame}[fragile]

frametitle{Details}



begin{tikzpicture}[>=latex, scale=0.5]

begin{axis}[

    name=ax1,

    legend entries={AAA, BBB, CCC, DDD},

    legend style={at={(1.12,-0.55)},anchor=south, fill=black, font=Large},

    ymode = log,

    width={linewidth},

    xtick={0,500,...,3000},

    xlabel={{XXX}},

    ylabel={{YYY}},

    x label style={at={(axis description cs:0.5,-0.08)},anchor=north, font=Large},

    y label style={at={(axis description cs:0,1.03)},rotate=-90,anchor=south, font=Large},

    xmin= 100,

    xmax=3000,

    ymin=500,

    ymax=25000,

    every axis plot/.append style={ultra thick}

  ]



addplot+ [mark=*, mark options={scale=.5}] table {

186 3153

218 2906

492 1573

678 1253

1082 1020

1609 881

2184 695

3957 480

};



addplot+ [mark=*, mark options={scale=.5}] table {

193 3464

279 2684

514 1576

810 1218

1245 1007

1827 883

2826 707

5429 508

};



addplot+ [mark=star, mark options={scale=.5}, color=darkgreen] table {

186 29407

218 26208

492 18350

678 14339

1082 13045

1609 8245

2184 6257

3957 3934

};



addplot+ [mark=star, mark options={scale=.5}, white] table {

186 28637

218 25286

492 17667

678 13855

1082 12837

1609 7909

2184 5904

3957 3806

};

legend{}

end{axis}



end{tikzpicture}



end{frame}



end{document}

Using line width option would do the job.

documentclass[tikz]{standalone}

RequirePackage{pgfplots}

begin{document}

begin{tikzpicture}

begin{axis}

addplot+[ultra thick, , mark=none] coordinates {(0,1.5) (1,1.5)};

addplot+[line width=10pt, mark=none] coordinates {(0,0.5) (1,0.5)};

end{axis}

end{tikzpicture}



end{document}

to get: