Hey Paige...you know they do have 2 different rear sizes for boys...maybe call them, I'm sure they'd switch for you....wonderful peepsWe just had surgery 2 weeks ago and are using the help em up harness currently. We have a boy and getting the back part of the harness to fit around his man bits so he doesn't potty on the harness is a challenge. I find myself leaving the back half off more and more when we go for potty breaks. Even so, the front half alone is helpful for our needs.