Ensure secure and professional packaging with these blank shipping envelopes, measuring 25x16cm. Constructed from high-quality gray-back white cardboard, these mailers provide excellent protection for smaller items, such as documents, photos, or delicate handmade crafts. The sturdy material prevents bending and damage during transit, while the blank surface allows for easy labeling or customization. Lightweight and eco-friendly, these envelopes are ideal for individuals and small business owners looking for a reliable and polished packaging solution. Whether for personal or commercial use, these cardboard mailers deliver durability, versatility, and a clean, professional appearance