Op just google. The classes are very well defined.
people on here are making up their own definitions. Like your parents are working or middle class so you are, refusing to accept social mobility, both up and down is a thing.
people can also be multiple classes in their life time, your class is you. Your parents class is theirs, you can be a middle class adult who had a working class childhood. You can be a middle class parent, who raised children who became working class.
effectively unskilled or semi skilled labour ie supermarket check out, construction labourer, wait staff, retail worker, road sweeper, is working class. Earning a wage rather than a salary.
middle class is further educated skilled labour, be it an electrician or a university lecturer, earning a salary,
people have huge emotion around this subject, as you can see from the thread, people who are clearly middle class arguing they are working class, and people who are working class arguing everyone else is.
for some it’s an emotive subject, that causes them to come up with their own definitions. The simplest way is to simply google the definitions, and then understand that some people may wish to identify themselves or others differently to that due to some personal emotion they feel about it , and thus create their own definition then declare it the actual definition. It isn’t. Clearly.