Wausau Astrobrights Premium Assorted Colored Envelopes #20275, 50 count #10 envelopes 4.125in x 9.5in Lunar Blue,Terra Green, Cosmic Orange, Solar Yellow, Rocket Red. Bright colored #10 business size enveloess 10 envelopes of each color Lunar Blue Terra Green Cosmic Orange Solar Yellow and Rocket Red. Acid and Lignin free Laser and inkjet guaranteed 9.5 x 4.125 business size envelope