I have to disagree with what tarheeldan said, since they're skinny jeans you wouldn't be asking for just waist and hem, you'd be looking to take in along the outside seams all the way down, so the fit is correct in the leg. I'd take it to the alterations place and ask if they can do it and what it would cost before making a decision either way. If it's <$20, go for it. If it's more, you'll have to set your own limit on how much you're willing to spend on this. It never hurts to ask, just be prepared to walk away and take the loss if it's going to be too expensive.