Yuzo font size

Hallo,
in the ‘Styling’ folder I can select font size, minimum allowed 12px.

Since I need to choose a smaller one, I tried to use ‘font-size’ property in the CSS file inside the ‘.yuzo_related_post .relatedthumb’ class.

However, while I had no problem to overwrite ‘font-family’ and ‘font-style’, unfortunately the ‘font-size’ had NO effect.

How can I reach my goal?
Thank you:-)

Pier

https://www.ads-software.com/plugins/yuzo-related-post/