So, here is an aluminum slate that writes 4 lines, 18 cells of larger, jumbo Braille characters. These cells are easier to read because the dots in each cell are farther apart. It's also easier to write with this slate because the cell windows are bigger - it's less difficult for beginners to position the stylus correctly. This slate also has labeling tape slots, meaning that you can use it to create Jumbo Braille labels for kitchen appliances or household items.
Remember though, Jumbo Braille is not widely used, and few (if any) books are produced in this bigger format. Braille is already much larger than print, so though this slate is an excellent learning tool, you will want to move on to using a standard-sized Braille slate after a short time.
(From the Writing Braille shelf.)