These #6 ¾ envelopes are ideal for mailing checks, payments, letters, and other small documents. Each envelope measures 3 5/8" x 6 ½", a common size for personal checks. Made from durable 24 lb. colored paper, they provide a professional look for everyday use. Designed to fit inside standard #10 business envelopes, they are convenient for organizing or enclosing return envelopes. Commonly used by churches, nonprofits, and small businesses, these envelopes feature a gummed flap that requires moisture to seal securely.