You'll be amazed at how easy it is to get dressed this way. Just a blazer worn with a black coat. As for shoes, add a pair of ankle boots to the equation.
Ankle Boots with Blazer Smart Casual Outfits In Their Teens
If you're in search of a laid-back but also totaly chic look, wear a blazer with blue denim shorts. For maximum effect, finish off with a pair of ankle boots.