Kourtney is wearing a snake print top by Joie, vintage brown belt and a pair of Skull & Bunny "Dylan" cropped jeans by Citizens of Humanity, Chloe clogs and her bag is by Bottega Venetta.
Kim is wearing a pair of boyfriend jeans by BEBE, a white Balenciaga tank top, necklace by Forever 21, crochet vest by Mink Pink, L.A.M.B shoes and a Chanel bag.
I found some great styles that are perfect for summer. I recommend to get a distressed vintage brown belt to wear with your boyfriend jean.
WGACA Vintage Vintage Levi's Boyfriend Jeans
WGACA Vintage Vintage Levi's Boyfriend Jeans
Current/Elliott The Long Boyfriend Jeans
7 For All Mankind Rickie Boyfriend Jeans with Crystals
AG Adriano Goldschmied Ex Boyfriend Crop Jeans