We can't tell you how many times we've tried on a blouse and felt like we'd found a good fit, only to realize at a later (and generally much more inopportune) time that certain movements caused gapping in the front. And that's never cool.

On occasion, we've resorted to using safety pins and double-stick tape, but have never been happy with the results. Either the pins aren't hidden or the tape just doesn't work. Finally, though, there appears to be a solution -- No See'ems.
What makes these different than other fashion tape is that they slide around and behind the buttons, so you look polished and tailored and not at all like you're holding your shirt closed with tape. Also, it's safe to use on most fabrics, including silk and cashmere, and it comes off with no residue.

Available for $12 at bugcatcherz.com.