9.75x12.25 White Self-Seal Side Loading Chipboard Stayflats Lite Mailers 100/Case RM129
$80.99
/ case of 100$0.81 per mailer
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| Quantity (case) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
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Shipping & returns details
Ships from U.S. warehouses. 30-day returns on unopened stock items.
Shipping cost and timing depend on the product, quantity and destination. Parcel or freight service is used as appropriate. Shipping discounts apply only to qualifying orders and rates.
Standard delivery is to street addresses in the contiguous U.S. Eligible returns must be unused and in original packaging; return shipping may apply.
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Inside dimensions
9 3/4" × 12.25"
Board / material
.028 Chipboard
Color
White
Freight class
Class 60
From our customers
“The packaging is sturdy, well-made, and looks professional. We’re really pleased with the quality.”
“They helped us choose the right packaging for our products and made ordering easy.”
“Ordering was easy, everything arrived as described, and we’ll definitely order again.”
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Specifications
| Inside dimensions | 9 3/4" × 12.25" (L × W) |
|---|---|
| Board / material | .028 Chipboard |
| Color | White |
| Sold as | Case of 100 |
| Physical units per order increment | 100 (one case) |
| Case weight | 23.18 lb |
| Outer carton (shipping) | 12.5 × 12.0 × 10.0 in |
| LTL freight class | Class 60 |
| SKU | RM129 |
About this item
SKU RM129 — 9 3/4" × 12.25", .028 Chipboard, White. Sold as a case of 100, shipped from US warehouses.
9.75x12.25 white self-seal side loading chipboard stayflats lite mailers 100 per case. Peel-and-stick self-seal closure. For shipping paperwork and flat goods without a box. Also known as mailing envelopes or shipping envelopes. Case quantity 100: 100 envelopes per case. Keeps paperwork flat, contained, and addressed.
Compare nearby options
Larger, smaller and stronger options from the same family. Prices shown are current case prices; freight is calculated at checkout.
Larger size
11x13.5 White Chipboard Self-Seal Mailers 100/Case
$70.86
Smaller size
9x11.5 White Chipboard Self-Seal Mailers 200/Case
$101.15
Same size, different spec
9.75x12.25 Kraft Self-Seal Stayflats Plus Mailers 100/Case
$54.60
Same size, different spec
9 3/4 x 12 1/4 in Kraft Stayflats Tab Lock Mailers 100/Case
$48.23
Common questions
Why choose side-loading over top-loading mailers for e-commerce?
Side-loading design dramatically reduces assembly time, simply slide documents in horizontally, seal, and ship. This simplifies fulfillment workflows, minimizes handling errors, and improves staff efficiency compared to traditional top-loading envelopes that require more careful insertion.
Will.028 chipboard protect photos and documents adequately?
Absolutely. The.028 chipboard thickness provides excellent puncture resistance and structural rigidity to protect against bending, creasing, and handling damage while remaining lightweight enough to optimize postage costs, a perfect balance for professional presentation.
Does the peel-and-seal closure require heat activation or special equipment?
No. The pre-applied peel-and-seal adhesive activates instantly with hand pressure, simply peel the backing strip and press to seal securely. The integrated pull-tab tear strip enables recipients to open quickly without tools, enhancing unboxing experience.
What's the cost advantage over heavier mailer alternatives?
Lightweight chipboard construction reduces per-unit postage significantly, especially for high-volume shippers. A case of 100 mailers saves on dimensional weight charges compared to thicker materials while eliminating the need for additional stiffeners, directly improving your shipping margin.
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Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.