To buy: Collection Petite Leather Leggings, $495; jcrew.com. ASOS Petite Leather Look Leggings, $34; asos.com. To buy: Blank Denim Vegan Leather Skinny Pants, $98; shopbop.com. To buy: SPRWMN High Waist Leather Ankle Leggings, $795; fwrd.com. Wilfred Free Daria Pant, $135; aritzia.com. To buy: J Brand Leather Super Skinny Pants, $998; neimanmarcus.com. Imitation Leather Pants, $35; hm.com.