What I like most about this outfit is the sweater and boots. you can make tons of different looks with those two items. Leggings and a long V-neck T-shirt. A cropped fitted top with high waisted (denim?) shorts (and for fall add tights underneath).
Jessica R. looks cute and ready for winter in this emerald green coat. You can get a similar look by pairing your over the knee boots with a block coloured coat. Coat: Zara, Turtleneck: Banana Republic, Jeans: Denim, Boots: Ivanka Trump, Bag: Prada.