Elizabeth Ricks explains how you can change the width of a bar in Excel:
Before we get into the step-by-step, I should mention that there aren’t any strict rules for optimal spacing between bars. Rather, it’s personal preference similar to wearing white after Labor Day (in the U.S., that’s the first weekend in September). As a resident of the muggy Southeast, I’ll be rocking white until fall temperatures arrive in mid-October. However, if you live in cooler climes and consider Labor Day the symbolic end of summer, your preference might be to say sayonara to white until Memorial Day.
The same gray area goes for optimal spacing between bars. The actual width is not set in stone. Our goal is to enable our audiences to compare the lengths of the bars (instead of the area between them), so general guidance is to thicken the bars to minimize the surrounding white space.
Click through for the process.