It depends on what your figure is like. I'm tall and I like my 35 because I love bigger bags (plus I do use it for school and sometimes travel). The 30 is great for most people, you have to be careful that the 35 doesn't swallow you up. For college you will be able to get more stuff in the 35... I'd go to an LV store and try them on to see which looks best on you. A lot of people like the NF for college too. I like the Palermo, there is lots of room and you can wear it in different ways. You might want to check out an Alma too, its a handheld purse like the Speedy.