#3B envelopes are a special class of coin envelopes with a variety of ...
#3B envelopes are a special class of coin envelopes with a variety of applications. Most coin envelopes cannot be mailed or used in automatic processes. #3B coin envelopes measure 2-1/2" x 4-1/4" and come in tan / brown and white kraft construction.
Some uses of coin envelopes include: