Common size of the standard paper has a3, a2, and even a1, usually practicing basic a3, because relatively speaking, a4 is too small, and a2, a1 and relatively large.
If you are a graduate school, then in the usual practice can be practiced with a3; painting the whole layout, for the target institutions of the examination requirements, choose a2 or a1 paper painting can be.
Brush class
Outlining pen: Japanese cherry blossom, unipin, these two are my usual.
(The outline of the pen has a thick and thin nib, the use is not the same, basically 01, 02 used to outline the details of the entire product, 05, 08 used to outline the product)
Marker: Fakkal (affordable, cost-effective), touch (slightly expensive), copic (expensive)
Black color pencil: Pfizer Classic 399
White Color pencil: PRISMACOLOR
Highlighter: large highlighter uniCorrection Pen, small highlighter GELLYOLL 10
Ruler class
In theory, the usual drawing of the product is basically out of the ruler of these aids, but if the exam, in the case of ensuring that the layout of the complete painting is completed, it is possible to use a Ruler to fix the drawn product picture.
Triangular ruler (large), curved board, round oval ruler ...
(probably so much, think of what is important to add, there is time to take a picture of all the tools to facilitate everyone to know what it is like)