Nasty Gal provides a comprehensive size guide to assist customers in selecting the appropriate sizes for their garments. The size guide typically includes measurements for various categories such as tops, bottoms, dresses, and outerwear. It offers detailed information on chest, waist, and hip measurements, allowing customers to compare their own dimensions with the sizes available. This guide can be accessed on the Nasty Gal website, generally found on the product pages or in the footer section under customer service or help topics. It is advisable for customers to refer to the size guide before making a purchase to ensure the desired fit, as sizing may vary between different styles and collections. Additionally, customers should keep in mind that personal fit preferences may influence the size they choose.