500 Self Seal Double Window Security Check Envelopes - Size 3 5/8 x 8 11/16 Inches - for Business Checks, Fits Perfectly (No Sliding or Moving) - Not for Invoices, 500 Count (30180)

Aimoh 500#8 Double Window Self Seal Security Envelopes - for Business Checks, QuickBooks & Quicken Checks, Size 3 5/8 x 8 11/16 Inches - Checks Fit Perfectly - Not for Invoices, 500 Count (30180)

Aimoh 500#10 Security Self Seal Envelopes, Windowless, Premium Security Tint Pattern, Ultra Strong Quick Seal Closure, EnveGuard, Size 4-1/8 x 9-1/2", White, 24LB, 500 Count(34010)

Amazon Basics Multipurpose Copy Printer Paper, 8.5" x 11", 20 lb, 8 Reams, 4000 Sheets, 92 Bright, White