6.5 x 4.5 in Rigid Mailers Cardboard Envelopes - 300 Pack

In this review of the 6.5 x 4.5 in rigid mailers, the bottom line is simple: this 300-pack is aimed at small businesses, artists and sellers who need a reliable, economical solution for shipping photos, prints and small documents. The reviewer found the mailers useful because they combine a sturdy 300gsm kraft cardboard with a peel-and-seal adhesive strip, which together protect flat items from bending, moisture and dirt while speeding up packing. If you ship prints or cards regularly, this set solves supply and protection in one go.

Key Features

• Pack size: A bulk quantity of 300 mailers keeps postage supplies stocked for busy shops or offices so you do not run out during peak periods.
• Material quality: Constructed from 300gsm kraft paper, the rigid cardboard provides structural support to reduce creasing for photos and small booklets.
• Size fit: Each envelope measures about 6.5 x 4.5 in, a practical size for art prints, photos, CDs, certificates and small booklets without excessive void space.
• Secure closure: The self-adhesive strip is quick to peel and seal, creating a reliable closure that helps shield contents from moisture, dirt and dust.
• Versatile use: Suited to post offices, online stores, home offices and stationery suppliers, the mailers work across many mailing needs where flat protection is required.

Who It's For

The mailers are best for independent artists, photographers, small online sellers and offices that ship prints, photos, certificates or thin manuals and catalogs. The 6.5 x 4.5 in size fits smaller flat items neatly, and the 300-count package is particularly well suited to shops that maintain a consistent shipping volume and want to buy supplies in bulk.

Those who should look elsewhere include sellers who need heavy cushioning for fragile three-dimensional items or those who require padded or bubble-lined envelopes; this product is rigid cardboard but not padded. Customers needing custom printing, branding or different sizes should consider a different supplier that offers customization.

Pros & Cons

Pros

• High quantity per purchase provides good value and reduces repeated reordering.
• 300gsm kraft board gives reliable rigidity to help prevent bends and creases in flat items.
• Peel-and-seal adhesive strip speeds up packing and creates a tidy, secure closure.
• Practical 6.5 x 4.5 in size fits common small-format items without wasted space.

Cons

• No built-in padding; not suitable for fragile or bulky items that need cushioning.
• Only one color option provided, which may not suit brands wanting colored or printed mailers.

Specifications

Pack quantity	300 pcs
Material	300gsm kraft paper (rigid cardboard)
External size	Approximately 6.5 x 4.5 in
Closure type	Self-adhesive peel-and-seal strip
Color	Brown kraft
Intended use	Photos, prints, CDs, certificates, booklets, documents

Our Verdict

These 6.5 x 4.5 in rigid mailers are a practical, cost-effective choice for anyone who ships flat small-format items regularly and needs protection from bending and environmental grime. The sturdy 300gsm board and peel-and-seal closure make packing fast and reliable, and the 300-count pack delivers good value for sellers and offices that want to avoid frequent restocking.

Frequently Asked Questions

Are these mailers padded?
No. They are rigid kraft cardboard (300gsm) and provide bend protection but do not include foam or bubble padding.

What items fit the 6.5 x 4.5 in size?
The size is suitable for small art prints, photos, CDs, certificates, small manuals and similar flat items where minimal extra space is needed.

Is the closure durable for mailing?
Yes. The self-adhesive peel-and-seal strip creates a secure closure that helps protect contents from moisture, dirt and dust during transit.