A Quick Fitting Adjustment Saved My Dress How to alter a too big dress? I thrifted a dress that was too big on me, took in the waist and shortened it, now fits like a glove : r sewing Love how I had this dress when I was fat, couldn't fit in it, then I did, now it's too big so I have my sister's instead How to alter a dress that is too big Swoodson Says Whether your gown is suddenly too small or too big, experts break down several quick fixes to try. Learn more at the link below