Wear the jeans and do squats, lunges, and bends for 10 to 15 minutes
Pull the waistband outward by hand while the jeans are warm
Spray the waistband with lukewarm water until slightly damp
Put the damp jeans on and move around until they dry
Lay the jeans flat and stretch the waistband with both hands
Insert a waistband stretcher or a sturdy chair back into the waist overnight
Use a steam iron on the waistband while gently pulling it wider
Soak only the waistband in warm water, then stretch it while damp
Repeat the stretching process several times if needed
Avoid using high heat that can shrink the denim again