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Product guide

Mr. Pen Clasp Envelopes, 18-Pack, 9 × 12 in, Brown Kraft

Mr. Pen clasp envelopes come in an 18-pack of brown kraft paper, each measuring 9 × 12 inches. The metal clasp and gummed flap offer two ways to close them for mailing or keeping papers together, while the listed size suits larger documents such as legal papers.

At a glance

  • Each envelope measures 9 × 12 inches, a size customers mention as useful for legal papers and document organization.
  • The flap has a metal prong clasp and a gummed seal, so buyers can use the clasp for holding the flap and the gum for sealing.
  • The listing says the envelopes are compatible with most inkjet and laser printers for addressing.
  • Customer feedback is positive about size and organizing documents, but reports on durability and sealing are mixed.
Price
$6.16Save 10%

Reference price: $6.85

Price checked: Nov 12, 2026

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Often bought together

Pros and cons

Pros

  • The 9 × 12-inch format is suited to larger papers and document storage.
  • The clasp and gummed flap provide two closure methods.
  • The listing claims compatibility with most inkjet and laser printers for addressing.

Cons

  • Customer feedback includes reports of envelopes tearing easily, despite other customers describing them as sturdy.
  • One customer says tape may be needed for added confidence in the seal.

Technical specifications

11 specifications
Identity and contents
BrandMr. Pen
Pack count18
Size9" x 12",18 Pack
Item dimensions12"L x 9"W
Materials and closure
MaterialPaper
ColorBrown
Closure typeClasp, Gummed
StyleClasp Closure
Shape and use
ShapeRectangular
OccasionEveryday mailing
Recommended useLetter

Who is it for?

A good fit for

  • Mailing or storing larger papers and letters.
  • Filing and organizing documents, including legal-size papers.
  • Buyers who want a clasp closure with a gummed flap and printer-compatible addressing, as claimed by the listing.

Less suited to

  • Buyers who need a documented paper weight or a guaranteed level of tear resistance.
  • Anyone requiring a confirmed tamper-resistant or security seal.
Mr. Pen Clasp Envelopes, 18-Pack, 9 × 12 in, Brown Kraft · photo 2
Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 2,521 ratings
  • 5 stars80%80%
  • 4 stars13%13%
  • 3 stars5%5%
  • 2 stars1%1%
  • 1 star1%1%

Customer feedback highlights favorable impressions of quality, value, appearance, size, and usefulness for storing and organizing documents, with the size noted as suitable for legal papers. Reports on durability are mixed: some customers find the envelopes sturdy, while others say they tear easily, and a separate concern is that tape may be wanted for extra sealing assurance. These are customer perceptions rather than a verified durability rating. The listing gives the size and closure type but no paper weight, so buyers handling heavier contents should not assume a particular level of toughness.

Positive themes

  • Customers describe the size as useful for legal papers and document organization.
  • Customers report positive impressions of quality, value, and appearance.

Negative themes

  • Some customers report that the material tears easily.

Mixed feedback

  • Durability feedback ranges from sturdy to easy to rip.
  • Some customers find the seal effective, while one mentions using tape for assurance.

Frequently asked questions

How many envelopes are included?

The listing specifies an 18-pack of brown kraft envelopes.

What size are these envelopes?

The listed size is 9 × 12 inches. The dimensions are also shown as 12 inches long by 9 inches wide.

How do the envelopes close?

They have a metal prong clasp and a gummed flap. Customer feedback on sealing is mixed, and one customer mentions using tape for assurance.

Can I print addresses on them?

The listing claims compatibility with most inkjet and laser printers for addressing. It does not specify printer models or settings.

Mr. Pen Clasp Envelopes, 18-Pack, 9 × 12 in, Brown Kraft · photo 3
Additional product photo 3

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