WESTERN STATES Open End Thumb Cut Envelopes 4.125 x 9.5 28# White Center Seam 500

Open End Envelopes for Everyday Mailing

These Western States envelopes measure 4.125 by 9.5 inches and come in a box of 500. The open-end design with a thumb cut makes it simple to insert and remove contents quickly. They suit offices, schools and homes that send standard letters, invoices or statements on a daily basis. The white sulphite stock gives a clean, professional appearance for routine correspondence.

Practical Limits of the Open End Format

The 28 lb sulphite paper handles single sheets and folded documents well but is not suited for bulky catalogues or heavy multi-page reports. The centre seam runs down the middle of the back, so address printing must avoid that line to stay legible. Moisture can weaken the gummed flap, so store the box in a dry area until needed. The 92 percent brightness works with most inkjet and laser printers but very dark solid coverage may show slight feathering.

Easy Loading with a Few Cautions

The thumb cut allows fast loading into desktop trays or folder inserters without jamming. Fan the stack before loading to separate any sheets that have stuck together during storage. Keep the box sealed when not in use to prevent the flap adhesive from drying out. Overfilling a printer tray beyond its rated capacity is the most common cause of misfeeds with this envelope size.