WESTERN STATES 10 x 13 28# White Open Side Booklet Envelope 500

White Sulphite Booklet Envelopes

These white sulphite envelopes measure 10 by 13 inches and come in a box of 500. They suit offices, schools and mailrooms that need a reliable supply for everyday correspondence. The open side design allows quick insertion of documents without folding. SFI certification confirms responsible forestry sourcing for the paper stock.

28 lb weight and 92 brightness

The 28 pound stock provides enough rigidity for multi-page letters, invoices and lightweight catalogues while keeping postage costs manageable. At 92 percent brightness the white surface gives clean contrast for printed addresses and logos. Very thick bundles or heavy catalogues may exceed the practical capacity of the side seam construction.

Side seam construction with remoistening seal

Two side seams placed underneath create a flat front panel that feeds smoothly through laser and inkjet printers. The vellum finish offers a subtle tooth that resists smudging during handling. A traditional remoistening seal secures the flap without the need for adhesive tapes or peel strips.