--- product_id: 65864965 title: "3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES)" brand: "sigma source" price: "271 zł" currency: PLN in_stock: true category: "Office Product" url: https://www.desertcart.pl/products/65864965-3-5-8-x-8-11-16-8-check-envelopes store_origin: PL region: Poland --- # 3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) **Brand:** sigma source **Price:** 271 zł **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) by sigma source - **How much does it cost?** 271 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/65864965-3-5-8-x-8-11-16-8-check-envelopes) ## Best For - sigma source enthusiasts ## Why This Product - Trusted sigma source brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size: 500Sigma Source Double Window Check Envelopes (3-5/8 x 8-11/16):Envelopes are designed for payroll checks, quickbooks checks and Laser checks.Our business check envelopes are compatible with standard 3 1/2" x 8 1/2" online printable checks that allow addresses on check to show through windows Our #8 Envelopes are designed for check envelopes - NOT for invoices or billing statements. (If you're sending invoices or billing statements use #9 Envelope instead - see ASIN# B07452HFQB)Key Features and Characteristics:#8 Envelope size is 3-5/8" x 8-11/16" - is just the right size for Quickbooks checks and other business Computer Checks.Adhesive is easy peel and self-sealing - Glue is prime quality and it easily shows if envelope seal is tampered.Self-seal business envelopes is designed to hide sensitive information Envelope is security tinted with blue checkered design - for confidentiality, preventing check content from showing or someone peeking!Color is White and is made with 24 LB Premium Smooth/Woven paper - envelope is strong (not flimsy or cheap)Primary Usage and Key Benefits: For mailing payroll checks or business checks to employees or to professional clients Hand-over Employees their paychecks enclosed in check envelopes is professional and dignifying - they feel respected and trusted. No need to print recipient or sender address on envelopes - simply print your quickbook check then slip it inside the check envelope. Saves time and expenses of separately addressing envelopes - simply position the addresses to show through the windows ## Features - <li> Designed for Quickbooks checks, Laser checks and it is compatible with other online printable checks (DOES NOT FIT INVOICES)</li> - <li> Envelope is Double Window and Security Tinted for added privacy to protect check content and confidentiality - <li> Envelope has easy peel and self-seal features - saves time and cost - <li> Adhesive is strong and stays glued during transport - no water or Licking Required! Just peel, press and you're done! - <li> Color: White, Texture: Smooth/Woven; Quantity: 500/box, Dimension: 3-5/8" x 8-11/16" (Checks Will Not Move) </li> ## Images ![3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) - Image 1](https://images-na.ssl-images-amazon.com/images/I/51M6S%2BPblML.jpg) ![3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) - Image 2](https://images-na.ssl-images-amazon.com/images/I/51lcq90HjwL.jpg) ![3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) - Image 3](https://images-na.ssl-images-amazon.com/images/I/51rG4EDAXML.jpg) ![3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) - Image 4](https://images-na.ssl-images-amazon.com/images/I/51LTBe2twRL.jpg) ![3-5/8 x 8-11/16#8 Check Envelopes by Sigma Source, 500-Pack Double Windows, Security Tinted and Self Seal For Payroll Quickbooks Checks, Business Checks and Laser checks (NOT FOR INVOICES) - Image 5](https://images-na.ssl-images-amazon.com/images/I/41gqoRqyUFL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/65864965-3-5-8-x-8-11-16-8-check-envelopes](https://www.desertcart.pl/products/65864965-3-5-8-x-8-11-16-8-check-envelopes) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-22*