# Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count

Mail 8.5 x 11 documents flat in these 9 x 12 self-seal envelopes. Buyers report mixed experiences with adhesive and thickness.

- [Original product page](https://www.ofertitastop.com/us/product/aimoh-38100-12-security-envelopes-self)
- [View offer](https://www.ofertitastop.com/us/visit/aimoh-38100-12-security-envelopes-self)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-19T22:44:09.275Z
- Brand: Aimoh
- Model: 38100
- EAN / GTIN: 00851685007125
- SKU: ofertitastop-us-127826
- Category: Office Supplies > Shipping Supplies > Packing Materials
- Source store: amazon US
- Active deal: Yes
- Price: 20.98 USD
- Previous price: 23.99 USD
- Discount: 13%
- Rating: 4.8 / 5
- Reviews: 2786

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

The 9 x 12-inch format is designed for mailing 8.5 x 11 documents without folding them to fit a smaller envelope.

Each envelope is white paper with a security tint and a self-seal closure, giving routine business correspondence a simple, consistent format.

A pack includes 100 envelopes. Buyer feedback is positive overall, though some report mixed results with the adhesive and the paper’s perceived thickness.

## How to use it

Use these flat envelopes for letters, documents, or similar paper items that fit within the 9 x 12 format. For example, a business sending forms or printed correspondence can place standard 8.5 x 11 pages inside without folding them. The security tint is intended to obscure the contents, while the self-seal strip closes the envelope without requiring a separate adhesive.

This format is roomier than a standard letter envelope, which can make sense when keeping pages flat matters. It is still a paper envelope, rather than a rigid mailer, choose packaging suited to the item if it needs more structure or protection than an envelope provides.

## Technical details

- Brand and model: Aimoh 38100
- Size: 9 x 12 inches
- Material and weight: White 28 lb paper
- Closure: Self-seal
- Security feature: Security tint
- Quantity: 100 envelopes
- Stated document fit: 8.5 x 11 inches

## Strengths

The combination of a larger flat format and self-seal closure suits recurring document mailings where folding pages is undesirable. The white finish keeps the exterior relatively plain for business correspondence, and the security tint adds a layer of visual privacy. These features make the pack more purpose-built for mailing documents than smaller everyday envelopes, while avoiding the added structure of a rigid mailer when that protection is unnecessary.

Buyers commonly describe the envelopes as useful for mailing documents and magazines and like their appearance and self-sealing format. Feedback on adhesion and thickness is less consistent: some are satisfied with the seal, while others report adhesive problems, opinions also differ on whether the paper feels substantial enough. That variation is worth weighing if dependable closure or a heavier feel is a priority for your mailing routine.

## Before you decide

**Will 8.5 x 11 documents fit?** The product information states that the 9 x 12 envelopes fit 8.5 x 11 documents, making them suitable when you want to send those pages flat.

**Do they require separate glue?** They have a self-seal closure, so the listed format does not require a separate gummed seal.

**Does the tint guarantee that contents cannot be seen?** The security tint is intended to obscure the contents, but the product details do not describe it as a guarantee of complete privacy. Consider the sensitivity of what you are mailing.

## When it makes sense

It’s a great fit if you regularly mail standard-size documents and want a white, security-tinted envelope with a self-seal closure in a 100-count pack. Not the best choice if your item needs rigid protection, or if you require a particular level of adhesive performance: buyer reports on the seal are mixed. For ordinary paper correspondence, the stated size and features make the intended use clear, for more demanding packaging needs, a sturdier format may be more appropriate.

## Images

![Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count — 1](https://www.ofertitastop.com/i/7jDO6xFbSY7WOGMC9Ex8QqvExnMsTMUkYI8OzuHt8YeaGFgWArbo1DpkOV2GLcI1ugTga-t2Q2nBQ1qZvV5990hRDSTWo_dBS5Fcooit2cpykw-_Oj7AZ12_6w.jpg)

![Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count — 2](https://www.ofertitastop.com/i/Aup1t26Zne_alJsuqU94_ECXYw7e4_2zoA3GWaJaNbUGJDGq51rSD_zkW7zySY3wkQLYKGJfDQBmliiqNZIRBfZO2SLaAhOcE86d9rWhsKtKNJ79qh-tp_I3OA.jpg)

![Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count — 3](https://www.ofertitastop.com/i/y5MjIcY_vRLscRMunjL3O5gnnWRbmA50eWZONkoo_FNaZTaK5-x9NYUiMmQvmus9zcAeHnLyFHqX_5ok6FNsbaxysPt79Fj5yAXrqWb5ucnVOpakRleyCpQdWg.jpg)

![Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count — 4](https://www.ofertitastop.com/i/9a45K0YjaqYgvT0Bs3bTAYsAk9KvZeosOqu_L7YoICFEVb6NH1iYLu72k1y5bZ5DDSvqKKKh59efItXwO1uJOc8VgCh_B5fr2ujEtlA3wAF3CtQZwznq2GxFTw.jpg)

![Aimoh 38100 9 x 12 Security Envelopes, Self-Seal, White, 28 lb, 100 Count — 5](https://www.ofertitastop.com/i/Mxx59sjJVOfmd7UpUvAi0milgC80fZeEHaqTrDRmpItrx3m_2YIP2FNQzg2R0dCYhaz9cBfNARtnURi-0DGYAyuTCLNdeGK6A8YGDUNXvndK9zaxxTMW0k-w7A.jpg)