Bright Pink 10 Business Envelopes-4 1/8 x 9 1/2-24Lb Envelope-Qty 50/pck (Bright Pink) 10 Regular Brightly Colored envelopes are ideal for most business documents sent daily to customers and vendors such as letters, invoices, statements and much more. Moisture activated gummed seal and measures Dimensions: 4 1/8 x 9 1/2 - Paper: Recycled, Brightly Colored Sulphite. Paper Finish Vellum Finish, Acid Free Laser & Inkjet Compatible. Qty. Per Pack: 50