5 1/2 X 5 1/2 Square Invitation Envelopes 28# White (Pkg of 100) Pack of (100) 5 1/2 x 5 1/2 Square Invitation Envelopes - 28lb. Bright White, Invitation Envelope Gummed Flap 28# White Wove Paper Includes Free Priority Shipping 1- 3 days