EnDoc 6x9 Envelopes Self Seal - 250 Pack - Designed For Photography, Oversized, Weddings, School & Office Bulk Pack - 28 lb Open Side Booklet white Envelope.

6x9 Booklet Envelopes - 250 pack - Mailing Envelopes Self Seal - White Letter Envelopes with Peel & Seal Closure - Open-Side 6x9 Envelopes - 28 lb Paper - Plain Envelopes for Business and Personal Use

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