Sortables - How can I force a small height of the placeholder?

Sortables - How can I force a small height of the placeholder?


I am using sortables in a CMS.
The problem is when you move large elements and try to place them
below small items last in the list of elements. It is very hard to
place them, and tolerance "pointer" is just too shaky.
I want to force a small height of the placeholder.
This is what I want to achieve, see example "source 1" from dojo:
http://dojocampus.org/explorer/#Dojo_Drag%20And%20Drop_Lists
The placeholder in dojo is about 2px high, and the usability is great!
I want to do this in jQuery UI sortables....
Any help would be very appreciated.
http://uploads.screenshot-program.com/upl0509489565.png