I bought these lace-ups from Old Navy 2 weeks ago and I have not stopped wearing them (yes, we are experiencing warm weather in Canada!). They were only $24.99 CAD so how can you go wrong?!
They are a copy of the Aquazarra flats that came out in the summer and just like many other brands, such as, Topshop and Zara; Old Navy came out with their own in faux leather and suede. They fit me perfectly and I didn't have to go up a size or lower so I would suggest buying your exact size.
They are super comfortable and for the price, even if they last me one season I will be more than happy. I just checked the website and unfortunately I don't see the flats in black leather anymore but there are a few pairs left in the yellow suede and nude.
If you have always wanted to buy these flats but didn't want to pay too much for it, I would definitely recommend buying these ASAP! Don't wait anymore!