Choosing packing shipping supplies is mostly about matching the enclosure to what you send most often. A stack of office letters does not need the same format as photos, documents, crafts, or reseller packages. The four options here cover everyday #10 envelopes, double-window business envelopes, blue poly mailers, and rigid stay-flat mailers, with listed prices from USD 17.95 to USD 41.60.
Quick take
- For everyday office correspondence: the 100 Windowless Self-Seal Envelopes - Secure, Printer Friendly for Home & Office is the lowest listed price and is described as #10 security envelopes that work with laser and inkjet printers.
- For flat items that should stay flat: the 100 Pack 12.8x9 Inch White Rigid Mailers Self Seal Stay Flat Cardboard Bulk is the highest listed price, but it is the only rigid stay-flat mailer in this set.
- For reseller-style soft shipping: the POLYMAILER 100 PACK SHIPPING MAILERS BULK RESELLER STARTER BUSINESS KIT SUPPLIES is the blue poly mailer option and sits near the low end of the price range.
- For larger office envelope volume: the 500 Count No 10 Double Window Security Envelopes Gummed Seal Business Office New gives the largest envelope quantity and is tied directly to business office use.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| 100 Windowless Self-Seal Envelopes - Secure, Printer Friendly for Home & Office | USD 17.95 | |
| POLYMAILER 100 PACK SHIPPING MAILERS BULK RESELLER STARTER BUSINESS KIT SUPPLIES | USD 19.99 | |
| 500 Count No 10 Double Window Security Envelopes Gummed Seal Business Office New | USD 30.00 | |
| 100 Pack 12.8x9 Inch White Rigid Mailers Self Seal Stay Flat Cardboard Bulk | USD 41.60 |
The spread is meaningful: the lowest listed option is 57% below the highest listed option. That gap is not just about count. The less expensive end is centered on standard envelopes and soft mailers, while the top of the range is a rigid stay-flat cardboard mailer format.
Decision matrix
| If your main need is... | Start with | Why it fits |
|---|---|---|
| Printing or mailing standard office envelopes | 100 Windowless Self-Seal Envelopes - Secure, Printer Friendly for Home & Office | It is described as printer friendly and sized as #10 security envelopes. |
| Sending flat documents, photos, letters, books, magazines, crafts, or CDs | 100 Pack 12.8x9 Inch White Rigid Mailers Self Seal Stay Flat Cardboard Bulk | The title and description focus on rigid, stay-flat cardboard mailers with self-seal closure. |
| Preparing lightweight reseller shipments | POLYMAILER 100 PACK SHIPPING MAILERS BULK RESELLER STARTER BUSINESS KIT SUPPLIES | The title directly frames it as a bulk reseller starter business kit supply. |
| Business mail with address windows | 500 Count No 10 Double Window Security Envelopes Gummed Seal Business Office New | The title names double-window security envelopes for business office use. |
Concise product notes
100 Windowless Self-Seal Envelopes - Secure, Printer Friendly for Home & Office
This is the simplest office-envelope pick in the group. The title points to a windowless self-seal design, and the description identifies #10 security envelopes with printer-friendly construction for laser and inkjet printers. That makes it a practical match for home or office mail where you want a plain white paper envelope rather than a window layout. The main limitation is the same narrow focus: it is a standard rectangular paper envelope, not a padded, poly, double-window, or rigid stay-flat mailer. If your packing shipping needs include photos, books, or items that should resist bending, another format here is better aligned.
100 Pack 12.8x9 Inch White Rigid Mailers Self Seal Stay Flat Cardboard Bulk
The rigid mailer is the clearest choice when the item being mailed is flat and you want the envelope format to stay flat. Its description mentions documents, photos, letters, books, magazines, crafts, certificates, stationery, CDs, and video tapes, so it covers more flat-item scenarios than a standard #10 envelope. The self-seal closure and long-side opening also make it distinct from the smaller office envelope choices. The tradeoff is price: at USD 41.60, it is the highest listed item in the comparison. It is also a cardboard mailer format, so it is not the same type of flexible soft shipper as the blue poly mailer.
POLYMAILER 100 PACK SHIPPING MAILERS BULK RESELLER STARTER BUSINESS KIT SUPPLIES
This blue poly mailer pack is the most direct fit for a small business or reseller who wants soft shipping mailers rather than paper office envelopes. The title emphasizes a bulk reseller starter business kit, and the description names a 12 x 15 format, which separates it from #10 letter envelopes. Its listed price is close to the lowest option, so it may appeal when the intended use is shipping rather than correspondence. The limitation is that it is not presented as rigid or stay-flat, and it is blue rather than white. If your priority is mailing formal business letters or flat documents that should remain flat, the envelope or rigid mailer options are more targeted.
500 Count No 10 Double Window Security Envelopes Gummed Seal Business Office New
The Staples envelope pack is the quantity-focused business-office option. Its title specifies double-window security envelopes, and the description ties it to #10 sizing and business office use. For offices that prepare repeated outgoing correspondence where address windows matter, this is more specialized than the windowless envelope pack. It also has the only clearly named Staples brand in the set. The limitation is format: it is still a #10 paper envelope, not a general shipping mailer. The title says gummed seal, while the attributes also include self-seal closure wording, so shoppers choosing by closure style may prefer the products whose self-seal wording is consistent in the title.
Final recommendation
For most routine office mailing, start with 100 Windowless Self-Seal Envelopes - Secure, Printer Friendly for Home & Office because it has the lowest listed price in the group and is directly described for home and office printer-friendly #10 envelope use.
For packing shipping that involves photos, documents, books, magazines, crafts, or other flat contents, the better-aligned choice is 100 Pack 12.8x9 Inch White Rigid Mailers Self Seal Stay Flat Cardboard Bulk. It costs the most, but it is also the only rigid stay-flat cardboard mailer here.
For reseller-style shipments where a flexible blue mailer is enough, choose POLYMAILER 100 PACK SHIPPING MAILERS BULK RESELLER STARTER BUSINESS KIT SUPPLIES. It is near the bottom of the listed price range and is clearly framed around bulk shipping mailers.
For office teams that need double-window business envelopes in higher quantity, choose 500 Count No 10 Double Window Security Envelopes Gummed Seal Business Office New. The count and double-window title make it the most office-form oriented pick, while the USD 30.00 listed price places it between the soft mailer and the rigid mailer.