Thank you all for the help!

Hey!

If i'm wearing the 634 fit in 21oz, and it's a tight after washing but then stretches to a point in which i might even use a belt, should i wear the 14oz in size 31 or 32? i measured my jeans and right now the waist is 31' inch and still has room to stretch.
I'm asking as iv'e heard that the 14 oz tends to stretch less.