Diferent heights in each form item

Hello.

Is it possible to change the height of some form items?
I want to aggregate some of the items together, whille the others remain as they are.

You can see what I mean in this form (It is in Portuguese):
http://demo.farmaciaemlinha.com/index.php/component/option,com_chronocontact/Itemid,54/

In the "Encomenda" Group I have 6 identical rows. I want to put them more close to eachother. Is possible?

Thanks in advance.

Hi Sphero,

I see you are using the multi holder, I wanna know how you want them to look like ?

also your template has border none and this makes all textboxes hidden!

Cheers
Max