ComboBox - dropdown list size


I have a little problem. Is there a (easy) way to change ComboBox dropdown list size? Currently it has 10 items by default, and I would like it to have 12 (months). Is there a way to change it?


This thread explains how to do it:
ComboBox: increase number of shown items

Thank you, that completely resolved my problem.
Sorry for creating this topic again but I have been looking under wrong keywords.
Thx again.