How to edit the size of an SVG?

Question

SVG

An SVG file was inserted https://codepen.io/anon/pen/aQzVJK?editors=1100 with a size of 250 x 312
Changed the values ​​in the viewBox, width, height, style to 40 and everything stopped displaying https://codepen.io/anon /pen/MzYOmv?editors=1100
What should I do to reduce it?

Answer 1

This black square lies at coordinates 0 0 and has a size of 40x40
When you changed the size of the viewbox to 40x40, it seemed to you that everything was gone, but in fact your figure lies to the right and lower.
On a good note, you need to honor what a viewBox is, what it is for, and how it works.