I would definitely size down. I usually get a large because I don’t want sleeves tight around my arms but with this I definitely should’ve sized down. There is so much stretch.

Bought the set for myself and one for my daughter. I tried on the fit is just right. I wear a size 16 or 1x in fashion nova size. I did size up on the jacket due to wearing a sweater underneath otherwise I could have worn a 1x. Everything looks nice and quality feels great.