A pair of chunky black wedges can do wonders for making your legs look thinner, (trust me, I know all the slimming tricks). Think about it- you have a big ol' chunk at the bottom of your leg (in a cute way), so by the laws of psychics* your leg has to appear smaller. Like heels, wedges make your legs appear longer (and therefore thinner), except wedges are much more comfortable to wear. Super versatile...they look great with leggings or a pair of skinny/straight leg jeans.
Some inspiration from Pinterest...
Lulus- Mona Mia Black Peep Toe Wedges
Lulus- Chelsea Crew Escalate Black Suede Oxford Wedges
For a night on the town...
Lulus- Luichiny Angel Lina Black Peep Toe Wedges
*Not really a law of physics.