Gimp 2.10 menu font size issue

[H.Seldon]

I have the following lines added to my gtkrc file located in my profile folder:

gtk-icon-sizes = "gtk-menu = 36,36:
gtk-button = 48,48:
gtk-small-toolbar = 48,48:
gtk-large-toolbar = 56,56"

style "default"
{
font_name = "Helvetica 12"
GimpDock::font-scale = 0.925
GimpDockbook::tab-icon-size = small-toolbar
GimpRuler::font-scale = 0.9
GimpToolPalette::tool-icon-size = large-toolbar
}
widget_class "*" style "default"

You also must select 'Use icon size from the theme' under preferences -> Icon Theme