Each of the search engines will format your results in their own way.
The Search Engine Description Tool is ideal for SEO, as it shows how some of the search engines will display your results.
Simply fill out the boxes to see how it affects how your description appears in the search results.
It's important to understand that this is for non-mobile. On mobile, everything is much more restricted.
Please note, there is a lot of variation in what the search engines actually display, compared to what is placed into the description box. The search engine may use your description text and other parts of the page, as it sees fit.