Is it possible to adjust size of box or note?

Try with a custom class, something like this:

.su-box.changemysize { width: 100px; }

To get the test wrap, try enclosing the box coding in div & float the div to the side:

blah blah blah <div style=”float: left;”>[su_box title=”blah” class=”changemysize”]inside the box stuff[/su_box]</div> blah blah blah

You might need to play with padding & margins to get the look you want for the text around the box.