If you're on the short side, you may have a hard time finding tank tops that fit well. The straps are often a little too long. And while a hem or alteration will do the trick, here's a simpler option that still looks good: use a scarf.
Refinery 29's Connie Wang demonstrates this in a video on the site. Simply pull the straps of the top together in the back, then tie them with a small, pretty scarf. (A small scarf is a good item to have on hand for other clothing hacks, too). Not only does it do the job, it looks good in the process. Similarly, you could also use a ribbon to do the job.
It's not always to find the perfect clothes for your body shape, so workarounds like this can be useful to have on hand. Check it out for yourself at the link below.
Shorten Tank Top Straps [Refinery 29]