OKI Square Envelopes with Window, White, 155 x 155 mm, 500 Pieces (91829)

500 white square envelopes with a left-side window, precision-cut to 155 x 155 mm from 80 gsm paper. The peel-and-seal closure keeps contents secure without moisture, and the straight flap feeds cleanly through laser and inkjet printers.

Overview

The OKI 91829 is a bulk pack of square envelopes engineered for everyday business mail, invitations, and personal correspondence. Each envelope features a straight flap with a permanent peel-and-seal adhesive—no licking, no taping, just press to close. The 80 gsm paper stock is opaque enough to keep contents private while remaining light enough for standard postage.

What stands out

• Square 155 x 155 mm format stands out from standard DL or C6 mail.
• Left-positioned 45 x 90 mm window shows the recipient address without a label.
• Peel-and-seal closure for fast, secure sealing.
• Compatible with laser and inkjet printers for direct addressing.
• Supplied in a cardboard box of 500 envelopes.

Technical details

• Dimensions: 155 x 155 mm
• Window position: left, 45 x 90 mm
• Paper weight: 80 gsm
• Closure: peel-and-seal, permanent adhesive
• Flap type: straight
• Quantity: 500 envelopes
• Colour: white

Our verdict

A dependable square envelope for high-volume mailing. The window and peel-and-seal strip save time, and the 80 gsm paper handles both laser and inkjet printing without jams. If you need a square format that stands out, this is a solid choice.