2PBasics White 7 inch Square Envelopes (7x7-inches) - 25 PK Color name: White Opaque 96B Size: 7 Square (7-x-7) - All square envelopes require additional postage to mail. Inserts should be smaller than envelope dimensions 10% Recycled - Offset Vellum Finish Envelopes converted from paper basis: 104 GSM (28/70lb Text) Square Flap: Moisten to seal