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Box of 500 white #9 envelopes with poly window diagonal seam

WESTERN STATES

WESTERN STATES #9 Poly Window Envelope 24# White Diagonal Seam 500 Count

SKU CH-KSJP-KTPXN

#9 poly window envelopes measure 3.875 by 8.875 inches, use 24 lb white sulphite paper with 92% brightness and a diagonal seam, and come 500 per box

  • SFI-certified paper supports responsible forestry
  • 92% brightness gives documents a clean professional look
  • Poly window protects address while keeping contents visible
  • Diagonal seam construction adds strength for mailing durability
  • 500 envelopes per box supply high-volume office needs

#9 Poly Window Envelopes — Business Mailing

These #9 poly window envelopes measure 3.875 by 8.875 inches and are made from 24 lb white sulphite paper with a vellum finish. The diagonal seam construction and remoistening seal suit high-volume office mailing. SFI certified stock offers 92 percent brightness for a clean, professional appearance. Each box contains 500 envelopes.

Compatibility — Window Placement and Paper Handling

The poly window sits 1-1/8 by 4-3/4 inches, positioned 3/4 inch from the left edge and 1/2 inch from the bottom. Verify that your address block aligns with this fixed window location before ordering. Confirm your printer or inserter feeds 24 lb diagonal-seam envelopes reliably to avoid jams. Buyers needing a different window size or position should select another product.

Storage Weight and Handling

A single box weighs 6.5 lbs and a full carton holds 2500 envelopes across five boxes. The 24 lb sulphite stock resists curling in normal office humidity but should be stored flat to keep the remoistening adhesive active. No special thermal or acoustic considerations apply to paper envelopes. Power draw is not relevant for this product.

Highlights

  • SFI-certified paper supports responsible forestry
  • 92% brightness gives documents a clean professional look
  • Poly window protects address while keeping contents visible
  • Diagonal seam construction adds strength for mailing durability
  • 500 envelopes per box supply high-volume office needs

Specifications

BrandThe Envelope Supplies Shop

Questions about this item

What comes inside the box and is anything else needed to use them?

The box contains 500 #9 poly window envelopes with a remoistening seal, so no extra adhesive or inserts are required.

Which capacity should I choose for regular office mailing?

The 500-count box weighs 6.5 lbs and is the standard quantity; a full carton holds 2500 envelopes if you need more.

How does the 92% brightness look when the envelope is printed and mailed?

At 92% brightness the white sulphite stock gives a clean, professional appearance that shows printed addresses clearly through the poly window.

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