Monarch Commercial Envelopes – 3 7/8 x 7 1/2 – White – 50/Pack Post author: Post category: Post last modified:July 21, 2026 Reading time:1 mins read Each 3 7/8" x 7 1/2" envelope is made from quality 24 lb. Size: Monarch ( 3 7/8" x 7 1/2"). Continue ReadingMonarch Commercial Envelopes – 3 7/8 x 7 1/2 – White – 50/Pack