How to Align the pieces with different scale?

Hi all, I'm making an puzzle game in w$$anonymous$$ch i'm programatically cutting the piece base on the mask and the resulted piece is of the different scale and random piece generated every time the game play. I want to align the object with each other. I know i can do t$$anonymous$$s by calculating each piece height, width and then calucalte the center and so on.. . just curios is there any optimal or some kind of shortcut solution . thanks here for more detailed what i would like to ac$$anonymous$$eve.