28 slots with various sizes for holding all types of brushes. Small, medium and large. No worries about them falling out. And also work for artist brushes, nail acrylic brushes, paintbrushes and so on, very practical. No more laying brushes all over the counter top. Doesn’t take up much space but it has plenty of space to put brushes to dry. This is a brush save, time saver and space saver.