This is a tricky question to answer only because everyone seems to have their own idea of what the ideal tunic length is. For the record, I prefer tunics that end right where my butt check meets my leg (read here for more). Any shorter than that and I can’t wear the top with leggings. Any longer than that and it begins to swerve into dress territory.
Here are a few options I found for you:
Old Navy Tami Tank, $8 - I’ve found Old Navy tanks (and some tops) to generally be quite long.
There is nothing worse than a pair of transparent leggings! I’ve had personal experience with a few of the above pairs, but included a couple others that I’ve heard good things about too.
LOFT Slim Leggings, $24.50 - I don’t own these myself, but have heard that they are nice and opaque.
Aerie Slim Gym Skinny Pant, $19.99 - Technically these are gym pants, but they’re cut like leggings. These are some of my favorite yoga/gym pants and the wide waistband helps with the pesky legging muffin top problem.
I used to blog about affordable fashion and style. Then I posted a few book reviews and what you might call "lifestyle things." And later, I had a baby. So, now I blog about everything. (But mostly fashion. Not just babies.)