#9 Ready-Seal Double Window Security Tinted Check Envelopes, Compatible for QuickBooks Checks, Sage 100 program, Blackbaud Software ETC, Box of 500 Box of 500 #9 Double Window Check Envelope, 3-7/8 X 8-7/8 Fold and Seal - Security Tint Inside "Stop Licking Envelopes" Just fold the flap, get a quick, secure seal Guaranteed to fit all your computer business checks Made in the USA by Next Day Labels TM SUPERLATIVE LARGE VALUE: Box of #9 (3-5/8 X 8-3/4) Double Window Check Envelope comes in a quantity of 500 Envelopes DOUBLE WINDOW ENVELOPE: These Double Window Envelopes easily accommodate all standard business checks like Intuit, Quick-Books, Sage 100, Blackbaud and much more. Checks align perfectly with windows without moving around. Envelope is ideal for all business, professional, personal and correspondence. &#034;STOP LICKING ENVELOPES&#034;. Just fold over the flap and press it down to get a secure sealing. These Business Envelopes feature a high quality Security tint inside that will keep your account numbers &amp; sensitive data away from peeping eyes. HIGH QUALITY ENVELOPES - Maintain a professional look and feel with our durable High Quality Crisp, bright white Envelopes. Whether its for personal or professional use, Next Day Labels envelopes make it easy to mail with confidence. Made in the USA by Next Day Labels TM