I want to share with you my know-how.
Figures are all different. There are cases when jeans in the waist are slightly scolded, literally 2 cm missing. And if you take jeans well on the waist, then below they hang, sit ugly.
And then I do as follows ...
Behind the upper edge of the slanging on the average seam of jeans, having sipped the stripe, if so is there, and burst out the belt between the side cuts behind.
Then cut the belt in the place where we have a stripe, insert the wedge width equal to the necessary increase to the volume on the waist + allowances for the seams, and the length of the width of the belt together with the bending allowance.
Then I note the middle on the belt, combining it with the middle suture of jeans. I begin to hide the belt on the upper cut of the rear halves of the trouser slightly pulling it into a new length of the belt. I'm pronounced and again.
Then we sew the cutting back, put the stripes in place, that's all.
But I want to immediately warn that this option for increasing the volume of jeans in the waist is possible if it is necessary to add no more than 3-5 cm, since the lengthening of the waist line is due to the information of the landing.