how to change the size of my start menu ?

how to change the size of my start menu ?
i want big icons for a dark theme, what i have to do for changing size of my start menu ?

Create a file called .gtkrc-2.0 in your HOME and paste:

gtk-icon-sizes = "panel-menu=16,16:panel=16,16:gtk-menu=16,16:gtk-large-toolbar=24,24:gtk-button=16,16"

panel-menu is the one you are looking for, you can remove the rest or change it to whatever size you want.

• Right-click the Start menu, then choose Properties.
• Click Customize in the new window, increase or reduce the number of recent programs to display.
• For example, for the size 13.

But if you want to reduce the maximum size of the Start menu, you will not only reduce the number of recent programs to display, but also uncheck some checkboxes, for example: uncheck Help, remove the link Help and Support. Or choose not to display the item to documents.
Here is a smaller size.

You'd have to modify your msstyles file. I'm not sure how extensively.

but is it the same for vista?