Clothes that are far too big are read as a role or responsibility you have not grown into yet. Some dream books see comfort in them too, as room to hide or to grow.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.