You can fit large jeans with a piece of cloth
First invented in the 1800s, the iconic jeans have been adopted by miners, rock stars, and high fashion alike. However, jeans may not be the perfect gift since sizing varies for every body shape. If someone has given you a pair of jeans or trousers which are too large, you may make them work with just a simple tip and some cloth.
What you are going to do is take a cloth and tie a knot between the two belt loops to pull the loops together. Pull the ends of the jeans till they fit you properly, then tuck the excess cloth into your pocket. Then, you can wear a shirt that is long enough to hide the pocket. Simple and functional.