HTML2PDF doesn't recognize tables' sizes

Have you tried with "style" attribute? All examples on html2pdf wiki is with this attribute : http://wiki.spipu.net/doku.php?id=html2pdf:en:v4:bookmark&s[]=td&s[]=width

You can also use "col" tags after the opening "table" tag. e.g.

<col width="250">
<col width="500">
<col width="250">