DL Black String & Washer Envelopes (Qty 100) 220mm x 110mm1 2 day delivery as standard on this product. These black string & washer envelopes are DL size 220mm x110mm, so fits 1 3 folded A4 paper. Made from high quality 180gsm paper. The string and washer closure is not just a cool and retro feature, it also means you can re use re seal the envelope, making them good for the planet too! The string & washer envelope makes a unique impression for marketing and advertising packs, and is also a lovely option for