On Mon, 13 Sep 2010 07:01:24 +0100 (BST), etimecowboy <etimecowboy@googlemail.com> wrote:
> 
> Hi everyone,
> 
> Does anybody know how to set the size of an in-line image when
> exporting html? I know that org can set that when exporting latex
> (with #+ATTR_LaTeX: width=), but could not find a similar way when
> exporting html. Thanks for the help.

The following

: #+attr_html: width="50%"
: [[./image.png]]

for instance, works just fine for me.  This is with up-to-date org.