10 ways to alter oversized jeans// how to to take in + downsize - YouTube
How to Make Jeans Waist BIGGER! Easy Jeans Alteration for Perfect Fit - YouTube
Amazon.com: TOOVREN Button for Jeans Too Big 8PCS, Perfect Fit Instant Button, Pant Button Extender, Jean Buttons Replacement, Metal Buttons Adds Or Reduces an Inch to Any Pants Waist in Seconds (Silver) :
Quickest Way To Take In Waist Of Jeans | Modern Mending
How To Alter Jeans That Are Too Big Without Sewing
How to alter the waistband of kids' jeans (without darts!) — Pin Cut Sew Studio