#10 Envelopes White, Gum Flap
The #10 white envelope is the standard business envelope in the United States. Every standard letter, invoice, statement, and piece of formal correspondence that leaves an office goes in a #10. It's the size accounting software generates address blocks for, the format postal automation is calibrated around, and the envelope that every supply room in the country already stocks. This version is 24 lb bright white wove with a moistenable gum flap, windowless face, and dual diagonal seams. Available blank for same or next day shipment, or with your logo and return address custom printed on the face. Free shipping on every order from Business Envelopes with no minimums.
#10 Envelope Size: Full Dimensions and Specifications
Buyers searching "no 10 envelope dimensions" or "#10 envelope size" are typically confirming measurements before a bulk order or checking compatibility with a document template or insertion system. Here are the complete specifications:
- Envelope size: 4 1/8 x 9 1/2 inches (4.125 x 9.5 inches)
- Interior enclosure space: 4 x 9.25 inches
- Metric equivalent: approximately 105 x 241 mm
- Paper stock: 24 lb white wove, smooth finish, 92 brightness
- Seam construction: Dual diagonal seams, V-shaped flap
- Closure: Moistenable gum flap
- Printer compatibility: Laser-safe and inkjet-safe
- USPS classification: First-Class letter rate on contents under 3.5 oz
The interior space of 4 x 9.25 inches accommodates a standard 8.5 x 11 sheet folded into thirds, which produces a folded panel approximately 3.67 x 8.5 inches. That leaves an eighth of an inch of clearance on each side, which is the tolerance that allows clean machine insertion without bunching or jamming. The 24 lb wove finish is the weight that runs cleanly through laser and inkjet printers, processes through USPS automated sorting without jamming, and holds its shape through postal handling from origin to delivery.
#10 Plain Envelopes: What Plain White Wove Gets Right
Plain white wove is the correct choice when the envelope itself shouldn't draw attention. For outgoing correspondence where the contents are the message and the envelope is the carrier, a clean white face with no tint, no window, and no pattern is the professional standard. The 92 brightness white wove reflects print clearly when addresses or logos are printed directly on the face, bonds cleanly with standard adhesive labels, and arrives looking sharp in the recipient's hands regardless of what happened to it in transit.
This is also the most economical format in the #10 lineup. No window film, no security tint, no self-seal adhesive system adds to the unit cost. For offices that run high letter volumes on standard correspondence, the plain white gum flap #10 is the right specification at the right price point, and bulk pricing drops the per-unit cost further as quantities increase.
Custom Printing on #10 Business Envelopes
Return address, company name, logo, and tagline printed directly on the envelope stock before shipment. The print sits at the upper left of the face, ready for use across all outgoing correspondence without any separate label or addressing step for the return information. PDF proof before production begins. Artwork on file for reorders. Blank stock ships same or next business day. Printed orders ship in 7 to 10 business days from proof approval.
For the same #10 format with a security tinted interior that blocks document contents from showing through the paper, see the #10 tinted white gum flap. For a window version that displays the recipient address from the document inside, see the #10 window white gummed seal. For peel-and-seal closure on the tinted format, the #10 tinted peel and seal handles high-volume runs without moisture activation. Browse the full #10 envelope range for every configuration we carry.
Free shipping
