Is it possible to make jeans waist bigger?
You can spray on lukewarm water and stretch the jeans with your hands, or you can even hop into the bath with your jeans on. If neither of these stretches your jeans enough, you can also add a small extension in the waistband on either side, which will help them fit more comfortably.
Use a Waistband Stretcher
"All you have to do is wet the waistband with lukewarm water (make sure it's damp), insert the stretcher, and turn the handle to expand.
If you need to enlarge the jeans only at the waist, you should go just a couple of inches below the waistband. If the jeans are tight at the hip area as well, you might want to join two pieces of elastic on top of each other to get a wider tape and go lower on the side seam.
Waist Too Small or Too Big
If you feel like you are suffocating inside your pants (they are super tight around the middle) or that the waist is too big and the pants are falling off of you, a tailor can take the waist in or out pronto and give your trousers a more comfortable fit.
Wet jeans and then put them on
Ok so this one isn't going to feel the best, but the denim fibers are easier to stretch when wet and by putting them on, they will stretch in the exact spots you need it most.
Sit in a warm bath while wearing the jeans.
Put on the jeans that are too snug, fill a bath with warm water, and sit in it. The warm (not hot!) water will help loosen and stretch the threading a bit. You obviously need to do this one in advance, and allow the jeans to hang dry when you're done.
Can it be fixed?: Taking in or letting out the waist of your pants is certainly possible. There's more room to take the waist in than to let it out, as there is only so much extra fabric at the seams. Take note, however, that the best outcome is achieved if the seat of your pants is also altered.
When your jeans aren't slim enough for your liking, a tailor can alter your jeans to fit as slim as you like. There are some precautions to note. Tapering your jeans can really only be done below the crotch.
The waist of your trousers should sit on or just above your hip bones and be tight enough to sit there without a belt and loose enough to allow 2-4 fingers to fit easily inside the waistband. The Waist Width of Proper Cloth trousers can be taken out by 0.75” (1.5” in total circumference).
Nerve entrapment
A 2013 review suggests tight clothing can cause a type of spinal nerve compression called meralgia paresthetica. This condition can cause numbness, tingling, and pain in the side of your thigh.
Should you keep jeans that are tight?
Ideally, your waistband should fit tightly enough that you don't need a belt, but not so tight that it feels constricting. For raw denim this means you can fit maybe two fingers into the waistband, but for stretchier styles that number goes up a bit to maybe four.
Jeans should be comfortably tight at first. If the jeans your trying on are really uncomfortably tight then they will probably only stretch a few inches. The best way to see if the jeans are going to be good for you is to do the sitting test. Sit down as you would in a car, and see how it feels.
Waist Too Small or Too Big
If you feel like you are suffocating inside your pants (they are super tight around the middle) or that the waist is too big and the pants are falling off of you, a tailor can take the waist in or out pronto and give your trousers a more comfortable fit.
When your jeans aren't slim enough for your liking, a tailor can alter your jeans to fit as slim as you like. There are some precautions to note. Tapering your jeans can really only be done below the crotch.