J. Crew Martie pant in bu-stretch cotton

J. Crew Martie pant in bi-stretch cotton in black. Great for work. Love these but need a different size. These have always been dry-cleaned. The inside of the waist band was white and from normal wear, it has gotten a little dingy looking, but this is not visible at all when they are worn. It would probably come clean if they were washed, but I only dry-clean.