I set the width to 201 pixels (to fit the width of my theme's sidebar widget area). I noticed the Like/Recommend text does not shorten below a certain number of pixels. It will even stick out when using the Twenty Eleven theme.
EDIT: Here is a screencap of the exact issue as seen using the Twenty Eleven theme on a sidebar template page and the widget in the sidebar (the linked screen capture is with both width settings at 100px to better illustrate it). Just to be clear I am talking about the part which says "Be the first of your friends to like this." or "Be the first of your friends to recommend this." (this issue occurs with both text displays). I realize that shortening that text is impossible, but I'd like it to display on more than two lines if possible, or at least push more of the text to the second line so the overall width is lower. Any ideas for a solution (or even a workaround)?