There's no minimum time you should wear a wet diaper. Your maximum time will vary as well. This depends on what diaper you are using, how wet it is, the concentration kr dehhdration of your pee, and the condition or resistance of your skin. Your max time could be only 2 hours, or it could be 24. Just don't wear so long you will risk a bad rash, and certainly not long enough to risk an infection. Generally you'll want to change before you leak or start to smell bad too.