91700 Double Window Envelope Size: 9 x 4 1/8″ Cut the time it takes to pay bills with these envelopes just stuff, seal and send. They’re designed to work perfectly with your checks. Guaranteed compatible: Exact fit with SSLB170 and DLB170 checks. Gummed closure: Flap seals securely when moistened. 24# White Wove Make a business-like impression: Crisp, bright white wove stock enhances your professional image. 2 Windows-Confidential Tint-Black Confetti Improve security: Tinted inside pattern keeps confidential information from showing through. Quality construction stands up in the mail Reduce mailing delays and wrong deliveries: Checks fit perfectly, so destination and return addresses don’t slide out of view. Top window: 1 x 4″ 7/16″ from left, 2 3/8″ bottom Bottom window: 7/8 x 3 1/2 15/16″ from left, 13/16″ from bottom 500 per boxMade in the USA