I tried the no-sew, adjustable jean buttons for waistbands
Jeans Buttons: Jeans Button, Movable Shank, 17mm, Tin Oxide
Amazon.com: 8PCS Perfect Fit Instant Button Pin, Instant jeans Buttons tightener, Jean Replacement Buttons Removable Button for loose jeans No Sew Buttons to Extend or Reduce an Inch to Any Pants Waist
Is it possible to remove this jean button? : r/sewhelp
Amazon.com: Enosea 20mm GHQ Jeans Button Tack Jacket Buttons Metal Replacement Kit 12 Set (20mm)
Jeans Buttons and Rivets – D.M. Buttons & Buttonholes
Gayatri Enterprises Brass Jeans Button, Size/Dimension: 17-20mm at Rs 3.5/piece in New Delhi