Plain Envelopes from Stationery Xpress 50 Envelopes per set. These versatile sets of envelopes are available in 4 colors and 2 sizes. SIZES: Informal size for 5 x 4 stationary and Correspondence size for 6.2 x 4.5 stationery.* Printed or Embossed Return Address is also available. Embossed Graphics Stationery Envelopes are from Embossed Graphics and will match their stationery products. Ideal for having extra envelopes, school notes, bill payers and for a new address. *These multi-purpose envelopes can accommodate other stationery but are from Embossed Graphics. Personalized Stationery and Embossed Stationery