The 80's style revival is in full swing and while women are being deluged with giant shoulder pads and leggings in lieu of pants (aren't you glad for that Y chromosome?), menswear is seeing a resurgence of double breasted suits.
Now the double breasted trend has its dangers, and you may be wondering, "But Emmi, when have two breasts ever been bad?", but the style is particularly body-type specific. If you have a stockier and/or shorter build, the two rows of buttons on the blazer and peak lapels can actually make your torso appear shorter and wider. If your frame falls into this category stick with single breasted suits.
Alternatively, if you really like the look but will not have occasion to wear a double breasted blazer enough to warrant the purchase, you can still incorporate the style into your repertoire with a double breasted cardigan. The cardigan iteration looks good on a wider range of body types too, a guy who would look too severe in a double breasted blazer can still look great in the cardigan spin off because the buttons are not spaced as widely apart and there are no formidable shoulder pads.
In addition to being more universally flattering, the cardigan will cost you less and give you more styling options than the blazer. Layering the cardigan over a solid, or printed T-shirt, wearing it over a button-down with or without tie, or underneath a sport coat are just a handful of the many options.