On this page you will find two sample tables of contents from Honours theses: one is from the School of BABS and one is from the School of Photovoltaic and Solar Energy Engineering.
When you look at the table of contents you can get an idea of how long each section of the thesis is. HOWEVER, these are only examples. Each school has its own specifications, some of which are stricter than others. Furthermore, each thesis is different and will have different emphases on particular sections. CHECK with your supervisor for advice on length of sections and of the thesis as a whole.
Sample 1: from the School of BABS
SAMPLE 2: from the School of Photovoltaic and Solar Energy Engineering