Header box height

Dear Aigars,

Back again! My website is at http://www.descondicionamento.com/

How can I reduce the white box (rectangle) height, where the header and the midia icons are inside?

Thank´s in advance

Add this code to Theme Options - Other - Custom CSS and tweak pixel value to get the results you were looking for.

.hgroup-wrap {
  padding-top: 20px;
  padding-bottom: 40px;

From what I can see you have already added some custom coding in header to make it larger. It is either in Jetpack CSS field, Theme Options or elsewhere.