White Translucent (Vellum) - A9 Envelopes - 25 PK Color: White Translucent Size: A9 (5-3/4-x-8-3/4) / Holds a Letter Size Paper folded in half / Inserts must be smaller than the envelope dimensions Flap: Square Flap - Moisten to seal Paper: Envelopes made from 30lb-Writing (113gsm)