When purchasing denim in bales, quality is categorized by Grade A (premium, no defects), Grade B (minor washable stains or small repairs), and Grade C (visible wear or damage). Buyers must verify the weight per bale (typically 45kg, 50kg, or 100kg) and the composition ratio, such as the percentage of 100% cotton versus stretch denim (cotton/spandex blends). It is essential to request a detailed packing list that specifies the ratio of men's, women's, and children's items to ensure the inventory matches your target market.