I have several of these in a few colors, including ones with lace trim.  They are a great smoothing tank to wear under clothing.  The best thing about them is they are long enough!  They are not binding at the bottom, they have the bottom part looser, which is great design-wise.  The straps are adjustable.  But don't expect TOO much slimming effect, they smooth but are not as slimming as SPANX.  I am not a small woman, I'm 5'8" a size 12 with a DDD chest, and I wear a MEDIUM in these.  The large or xl will not slim you at all unless maybe you're plus-sized 18 or over, so order down so it's tighter, you want to feel held in.

If you want cleavage, this doesn't show too much, but it's a plus in the top part for me because it's not tight up top and doesn't flatten me out.

Overall a good buy for light slimming and everyday wear.