5 Pcs sponges are applicable in both dry and wet use, which wet size is twice as the dry size. Sponges in different colors and shapes for different use, perfect for applying foundation, concealer, primer, etc. You could wash, dry or store up the sponges with the holder case. Any other sponges in similar size could all fit the case. The slot plate could be moved if you like to use it as an organizer case for more sponges or pieces like jewelry or lipsticks and so on.