There are different prices of entry for tickets with lockers and tickets with private cabins. But what is a cabin in all of the major Baths of Budapest, and what is a locker? It is good to know that there are no plain tickets without a locker or a cabin (except for the special bath tour tickets, which entitle visitors to have a short 15 minute bath tour for example in Szechenyi Baths, or in Gellert Spa).
Both lockers and cabins are for storing your valuables while you are enjoying the indoor baths and outdoor pools. Lockers are standard wardrobe type boxes with a lock on them (like the ones at train stations). The size of the locker is 120x30x65 cm (1200 x 300 x 650 mm).
Cabins, on the other hand, are smallish cubicles or changing rooms combined with storage facilities, that is you leave your stuff there. In a bath cabin, you can get changed privately AND store your items in a safe place.
The cabin comfortably accommodates one person, but it will do for a couple, a family or even a small group. Bath entries with cabin use (or more precisely, cabin hire) are more expensive than simple lockers. If you buy tickets with lockers, you will have to get changed in the women-only / men-only public changing rooms, and then store your belongings in the lockers. If you wish to have your own privacy or are shy, cabins are definitely an ideal solution. Regular swimming pool goers will be fine with the lockers we assume.