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White rectangular envelope with clear poly window and blue interior tint

WESTERN STATES

WESTERN STATES #9 Poly Window Envelope 3.875" x 8.875" 24# White Blue Wesco Tint Box of 500

SKU CH-D2SV-DH44H

White sulphite #9 envelopes with a poly window, diagonal seam and blue Wesco inside tint, SFI certified at 92 % brightness, 500 per box

  • Professional presentation with Blue Wesco inside tint for privacy
  • SFI certified white sulphite paper ensures responsible sourcing
  • Vellum finish provides smooth writing and printing surface
  • Diagonal seam construction adds strength for mailing durability
  • Poly window shows recipient address without extra labelling

#9 Poly Window Envelope

The Western States #9 Poly Window Envelope measures 3.875" x 8.875" and uses 24# white sulphite paper with a vellum finish. It is designed for businesses mailing standard letters or invoices that require a visible address through the window. The blue Wesco inside tint adds opacity to protect document privacy.

Sustained mailing performance

The diagonal seam construction provides structural integrity across high-volume print runs and automated insertion equipment. SFI certified paper stock maintains consistent 92% brightness and feed reliability over the full 500-count box. Remoistening seals activate cleanly without jamming during extended processing sessions.

Window placement decides fit

The poly window measures 1-1/8" x 4-3/4" positioned 3/4" from the left edge and 1/2" from the bottom. This specific alignment determines whether your printed address block appears correctly without manual adjustment. Buyers whose forms use a different window coordinate cannot use this envelope.

How it compares

Measured against everything we stock in Document Envelopes & Pouches, at today’s prices. Recalculated every night.

Price $50.99
Cheaper than about 63% of the 638 comparable items (median $61.99).

Specifications

Product
Brand nameThe Envelope Supplies Shop

Questions about this item

How much does a full box of 500 envelopes weigh for all-day desk storage?

Each box of 500 weighs 6.5 lbs, so a full day's supply stays light on the shelf.

What sealing method do these envelopes use so I know if I need a moistener?

They have a remoistening seal; just apply water to the flap and press to close.

Will the 1-1/8" x 4-3/4" poly window align with addresses printed on standard letter templates?

The window sits 3/4" from the left and 1/2" from the bottom, matching common #9 layout positions.

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