At home centers etc., this size is not quite useful.
Until now I used cheap stuff and it was hard to erase by the marker etc, so the price was high but I decided to purchase one of the major manufacturers. Even markers that have been used for a long time are satisfied because they can be erased easily and cleanly.
The included marker and eraser are also easy to use.
Although the use period is still short, I expect it to be useful for a long time.