\setlength\extrarowheight{2pt}
\begin{tabular}{|l|D{,}{.}{2}D{,}{.}{1}|}\hline
\bfseries Jm\'eno & \multicolumn{1}{c}{\bfseries V\'y\v{s}ka [m]} &
\multicolumn{1}{c|}{\bfseries V\'aha [kg]}\\\hline
Zlatovl\'aska & 1,68 & 62,3 \\
Dlouh\'y      & 12,6 & 98,1 \\
\v{S}irok\'y  & 1,83 & 386 \\
Bystrozrak\'y & 1,74 & 74,2 \\\hline
\end{tabular}
