I went up to size M in this 1/2 zip Therma-fit pullover for a very relaxed and forgiving fit as well as extra length. 7/8 black leggings (25" petite friendly inseam) in size XS (I also have them in size XXS for a more snug fit). I took my usual 1/2 size down in these leopard print New Balance 327 sneakers. Athleisure

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Nike Women's Therma-FIT One Long-Sleeve 1/2-Zip Jacket | Dick's Sporting Goods
Women's Long-Sleeve 1/2-Zip Top | Nike (US)
New Balance 327 Sneakers | Anthropologie (US)
New Balance Women's 327 Shoes | Publiclands | Public Lands
327 Sneakers | Free People (Global - UK&FR Excluded)
HeyNuts Essential High Waisted Yoga Capris Leggings, Tummy Control Workout Cropped Pants 21'' | Amazon (US)