number of categories on one line

Hello, In preparation of the migration of the website Laura.hagmeijer.nl I try to rebuild the website on staging.toerfietsleusden.nl. Here I met a old problem: it isn’t possible to have five categories on one line. The category images are very big, while the settings are exactly the same is on Laura.hagmeijer.nl I installed this morning the theme: catchmagpro and guess what: no problem. Is there a solution for this problem? Kind regards Hans Hagmeijer