KEEP VITAL INFORMATION SAFE & SECURE DURING MAILING WITH OUR INDUSTRY-BEST CONFIDENTIAL ENVELOPES. STANDARD #10 SIZE ACCOMMODATES BUSINESS CHECKS & CORRESPONDENCE. LINED WITH BLUE TINTED PATTERN SO PRIVATE INFORMATION & NUMBERS DON'T SHOW THROUGH. QUALITY CONSTRUCTED; PRE-PRINTED WITH YOUR COMPANY'S BUSINESS NAME, ADDRESS AND LOGO, POSTAL PERMIT AND POSTAL ENDORSEMENT. 9 1/2" W X 4 1/8" H