How to Stretch and Shrink Your Denim: 6 Hacks to Try | Who What Wear
7+ Brilliant Ways to Stretch the Waist On Your Jeans
I compared size 10 jeans from Marks and Spencer, Primark, H&M and New Look - 1 pair was basically a whole size smaller' - Amber-Louise Large - MyLondon
3 Easy Ways to Stretch the Waist on Jeans - wikiHow