That sounds like a 'Germany' problem, not a 'free university' problem. There are trivial ways to keep class sizes manageable. One way is for universities to li

That sounds like a 'Germany' problem, not a 'free university' problem. There are trivial ways to keep class sizes manageable. One way is for universities to limit the available places in each degree for first year enrolment, and assign these places based on entrance exam results (as in Spain, where tuition isn't free but is very cheap compared to the U.S.). Another way is to have unlimited first year places, but restrict places from second year onwards to a given number n, allowing only the top n students from the first year to progress (as in France, where tuition is not technically free but averages to < 200€ a year).