Mechanism
Braille is made from six points.
A usual size of braille is a size of the figure below though there is the one that the size is a little different because of the tool that braille writes, too.
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It is a size that is not greatly though read touching by the forefinger but not too small.
In view of reading touching, it is read as the point of the point of the point of one, the point of two, and 3, the point of four on a right row, and 5 and the point of six on a left row.
Reading touching and the right and left become opposite because it strikes the braille when writing back.
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