How to make size tailored label with envlab?

Question

According to the package guide I should be able to declare label sizes in the preamble of the document like in this example:

\documentclass[12]{letter}

\usepackage{envlab}

\SetLabel{63mm, 46mm, 10mm, 8mm, 3mm, 3, 6}
\begin{document}
\startlabels
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}
\mlabel{}{%
    givenname surname \\
    Address line \\
    postalcode \\
    Country
}   
\end{document}

However when I do that I get:

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.12 }

and if I move the \SetLabel to after \begin{document} I get:

! Missing number, treated as zero.
<to be read again> 
                   \par 
l.13 \mlabel{}
              {%

What have I missed? What am I doing wrong?

Answer 1

The command \SetLabel has seven arguments, not a list argument:

\SetLabel{63mm}{46mm}{10mm}{8mm}{3mm}{3}{6}