Invitation Envelope
JAM Paper® Plastic Booklet Envelopes, Legal Size, 9 3/4" x 14 1/2", Hook-And-Loop Fastener, Smoke Gray, Pack Of 12
Amazon
JAM PAPER Plastic Envelopes with Hook & Loop Closure - Legal Booklet - 9 3/4 x 14 1/2 - Smoke Gray - 12/Pack