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Box of 500 white square envelopes with vellum finish and 1.875 inch flaps

WESTERN STATES

WESTERN STATES 9" x 9" 28# White Square Envelope 1.875" Flap Box of 500

SKU CH-H52J-RB4EQ

White sulphite envelopes with vellum finish and square flaps, SFI certified at 92% brightness, 500 per box

  • Professional look with 92% brightness white sulphite paper
  • SFI certified sourcing supports responsible forestry practices
  • Vellum finish gives a smooth, tactile writing surface
  • Two side seams add strength for secure mailing
  • Box of 500 envelopes ready for high-volume use

Square envelopes for correspondence

These white sulphite envelopes measure nine inches square and come in a box of five hundred. The 28 lb stock carries an SFI certification and a 92 percent brightness rating for a clean, professional appearance. A vellum finish adds a subtle texture suited to formal mailings.

Suited for invitations and announcements

The 1.875 inch square flap and side-seam construction work well for greeting cards, wedding invitations and business announcements. Users who need a window envelope or a heavier weight for bulky inserts should consider a different specification.

Capacity and handling

Each box contains five hundred envelopes and weighs 17.5 lbs, providing ample supply for large mail-outs. The remoistening seal secures each piece reliably, though very thick multi-page packets may exceed the practical capacity of the 28 lb paper.

Highlights

  • Professional look with 92% brightness white sulphite paper
  • SFI certified sourcing supports responsible forestry practices
  • Vellum finish gives a smooth, tactile writing surface
  • Two side seams add strength for secure mailing
  • Box of 500 envelopes ready for high-volume use

Specifications

BrandThe Envelope Supplies Shop

Questions about this item

What maximum media weight should my printer support to run these 28# envelopes?

Check your printer’s manual for a maximum media weight of at least 28#; most office printers list this in the paper-handling specifications.

Will the 1.875" square flap interfere with feeding in an older tray that expects standard commercial flaps?

The square flap is 1.875" deep and sits flush when sealed; test a single envelope first to confirm the tray guides clear it.

How can I verify the 92% brightness and vellum finish are correct once the box arrives?

Compare a sheet under daylight to a known 92% brightness reference; the surface should feel slightly toothy, not glossy.

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