No. 7 Coin Envelopes - Money Envelopes for Cash & Coin - 28 lb Brown Kraft Paper - Gummed Flap - Pack of 55 Currency Envelopes 28 LB BROWN KRAFT PAPER: Made from 28 lb brown kraft paper, these bank envelopes are perfect for storing heavy items such as coins. Thanks to their durability these mini brown envelopes can be used to store several heavy coins of multiple denominations. GUMMED FLAP: All Check O Matic number 7 coin envelopes come with pre-gummed flaps. The gummed flap delivers a secure seal and it can easily hold up to rough postal handling. SMALL VALUE PACK: This pack of 55 coin & cash envelopes is perfect for personal and business use. A single pack contains enough envelopes for keeping cash separate for different monthly expenses. PRECISE SIZE: Each envelope is machine-cut to measure 3  x 6  inches.