When customizing a cosmetic bag, it's important to consider the size, materials, and design. Consider what items you'll need to store in the bag and choose a size that will fit them comfortably. Materials should be chosen based on the items you plan to store, as some materials may not be suitable for certain items. Common fabrics suitable for making cosmetic bags include cotton, canvas, nylon, and polyester. Each fabric has its own pros and cons, so it's important to consider which material is best suited for your needs. Cotton is durable and breathable, while canvas is waterproof and lightweight. Nylon and polyester are both lightweight and waterproof, but nylon is more durable.
The cosmetic bag should have several functions, such as providing enough space for your cosmetics and accessories, being easy to carry and store, having a secure closure, and being waterproof. Additionally, the bag should be durable and have pockets or compartments to keep items organized.
Finally, think about the design of the bag and choose something that reflects your style.