typesize, baselineskip:

    article doc style            10pt            11pt            12pt
    size
\tiny                   5,6             6,7             6,7
\scriptsize             7,8             8,9.5           8,9.5
\footnotesize           8,9.5           9,11            10,12
\small                  9,11            10,12           10.95,13.6
\normalsize             10,12           10.95,13.6      12,14.5
\large                  12,14           12,14           14.4,18
\Large                  14.4,18         14.4,18         17.28,22
\LARGE                  17.28,22        17.28,22        20.74,25
\huge                   20.74,25        20.74,25        24.88,30
\Huge                   24.88,30        24.88,30        24.88,30
\part                   Large,huge bf   Large,huge bf   Large,huge bf
\section                Large bf        Large bf        Large bf
\subsection             large bf        large bf        large bf
\subsubsection          normalsize bf   normalsize bf   normalsize bf
\paragraph              normalsize bf   normalsize bf   normalsize bf
\subparagraph           normalsize bf   normalsize bf   normalsize bf
\title                  LARGE           LARGE           LARGE
\author                 large           large           large
\date                   large           large           large