Determining the right shipping box size is crucial, and Nantong Milan Packaging offers systematic guidance to help clients choose appropriately. Start by measuring the dimensions of the item to be shipped, adding 1-2 inches on each side for cushioning materials like bubble wrap or packing peanuts. For irregularly shaped products, use a rectangular prism to approximate the size, ensuring all protrusions are accommodated. Consider the weight of the item, as heavier products may require sturdier, slightly larger boxes with reinforced corners. Nantong Milan’s industry-specific recommendations include: small boxes (8"x6"x4") for cosmetics or small gifts, medium boxes (12"x10"x8") for home textiles or small appliances, and large boxes (20"x16"x12") for electric tools or bulky items. The company’s online size calculator tool allows clients to input product measurements and receive instant recommendations, factoring in shipping regulations and material efficiency. For unique products, custom sizes can be created through 3D modeling and prototyping, ensuring a precise fit. Nantong Milan also advises on balancing box size with shipping costs, as oversized boxes may incur additional fees. With 15 years of production experience, the team provides personalized consultations to help clients select the most efficient and cost-effective box sizes for their specific needs.