Preppy style is all about keeping things accurate and proper. It is like a smart-casual look, where everything is coordinately fitted and matched. The main garments of this style are polo shirts, checkered tops, knitted sleeveless pullovers, geometric print sweaters, blazers, Bermudas, pleated dresses and skirts and high socks.
Preppy lovers avoid wearing jeans. They choose chinos. Instead of denim. All clothes are made of natural fabrics, including wool, cashmere, cotton, linen, etc. You should pay attention to accessories. It should be small, but expensive. Personally, I like preppy shoes, like moccasins, ballet pumps, loafers, Oxfords, brogues, boat-shoes, etc.