notbuying:

This is an interesting idea!  It’s basically a quick tailor for any pair of jeans!  My big booty is always fighting with my smaller-than-my-booty belly when it comes to jeans fitting, and this is a handy little helper in that department!  And I like the packaging, too!

I bought something very similar (http://www.instantbuttonforjeans.com/) to these for a pair of jeans that lost a button, and they work great. They’d also be good for adjusting your jeans to be tighter or looser.