Astrobrights Color #10 Envelopes, 4.125 x 9.5, 24 lb/89 gsm, Happy 5-Color Assortment, 50 Envelopes (20246) 24 lb / 89 gsm paper; Size: for everyday use Color(s): Cosmic Orange Paper, Solar Yellow Paper, Terra Green Paper, Venus Violet Paper, Fireball Fuchsia (Pink Paper) 25 Color Envelopes; Size: 4.125 x 9.5 (#10 Size) Compatible with inkjet and laser printers, and copiers Bright color envelopes are ideal for high-impact correspondence, direct mail, and more