Tilly's (originally known as World of Jeans and Tops) is an American retail clothing company that sells a wide assortment of branded apparel, accessories, shoes, and more. Tillys headquartered and operated from Irvine, California. The company opened its first store in 1982 in Southern California. Tilly's stores are located in both traditional outdoor shopping centers and in shopping malls. The average store size is 7,900 square feet (734 m). Due to their size, Tilly's locations in malls usually take up two or three store spaces.

Tilly's primarily sells clothing, shoes, and accessories for various active lifestyles including lounging, surfing, skateboarding, and snowboarding along with sports such as motorcross. Among the brands sold are Vans, Adidas Originals apparel and footwear, Riot Society, RVCA, Diamond, Salty Crew, Primitive, Converse, Hurley, Nixon, JanSport, LRG,Stance, Hurley, Volcom, Billabong, Nike SB and more. They also have as an extensive selection of Levi's and Dickies. They carry exclusive brands such as Blue Crown, RsQ, Full Tilt and more. Not only a destination specialty retailer of casual apparel, footwear, and accessories, but one which offers a unique shopping experience for men, women, boys and girls. The Company offers an unparalleled selection of relevant brands, styles, colors, sizes and price points. Tillys is known for having the latest styles from brands, exclusively sold at Tillys. The Company's apparel merchandise includes branded, fashion and styles for tops, outerwear, bottoms and dresses. Its accessories merchandise includes backpacks, hats, sunglasses, headphones, handbags, watches, jewelry and curated selection of footwear of sneakers, sandals and boots from various brands in a range of pricepoints. The Company offers its products through stores and Website. The Company operates over 220 stores in approximately 30 states across the United States. The Company's stores are located in malls, lifestyle centers, power centers, community centers, outlet centers and street-front locations. The Company also operates an e-commerce platform for desktop and mobile.