Nancy B2 answered:
Yes. I had to widen the neckline because of lack of fabric from some front detail on the recycled dress though. I was afraid it would be too much but worked out great. The sleeve length was determined by the recycled dress too. I was very surprised that I barely got a size large t-shirt from a size 20 dress. I probably could have used a smaller pattern size because the measurements on the class pattern seem off. I had to take it a lot in the body.