I want to make a grid for practicing Kanji (Japanese symbols)
I want grid where each cell is divided with dashed lines. If one cell is 1cm or larger it works great. However, I want each cell to be 0.8 x0.8cm an If I choose anything smaller than 1cm it compiles but the measures are different and the there are no dashed lines. Can't upload a photo right now.. It always says error occured at imgur...

```
\documentclass[a4paper]{article}
\usepackage[margin=1cm]{geometry}
\usepackage[svgnames]{xcolor}
\usepackage{pgfplots}

\begin{document}
\thispagestyle{empty}
\pgfplotsset{minor grid style = {dashed, Gray}}
\pgfplotsset{major grid style = {solid, Black}}
    \begin{figure}\centering
        \begin{tikzpicture}[Black]
        \begin{axis}[grid = both,
                     ticks = none,
                     minor tick num = 1,
                     xmin = 0,
                     ymin = 0,
                     xmax = 17,
                     ymax = 26,
                     width = 17cm,
                     height = 26cm,
                     scale only axis]
        \end{axis}
        \end{tikzpicture}
    \end{figure}

    \newpage

    \pgfplotsset{minor grid style = {dashed, Black}}
\pgfplotsset{major grid style = {solid, Black}}
    \begin{figure}\centering
        \begin{tikzpicture}[Black]
       \begin{axis}[grid = both,
                 ticks = none,
                 minor tick num = 1,
                 xmin = 0,
                 ymin = 0,
                 xmax = 16,
                 ymax = 24,
                 xtick = {0, 0.8,..., 16},
                 ytick = {0, 0.8,..., 24},
                 width = 16cm,
                 height = 24cm,
                 scale only axis]
    \end{axis}
        \end{tikzpicture}
    \end{figure}

\end{document}

```