These C4 white self-seal pocket envelopes with windows offer a smooth, high quality finish that caters for all your posting needs. With a self-seal closure for a strong, reliable seal, our white envelopes are ideal for sending all your important documents from invoices to letter. Key features: Manufactured from high-quality 100gsm paper Eco-friendly; recyclable, biodegradable, compostable & PEFC certified Window Size: 40 x 105mm   Window Position: 213mm up – 24mm from the left   Paper Weight: 100gsm