Saves on weight of envelope
588094
In my younger years I would use onion skin paper to write my International letters.  I'd drifted from habit and forgot about the onion skin until I started writing Internationally again.  I realized how much weight mattered and when you write close to 10 pages at a time it helps on saving on the weight of the envelope.  Highly recommend this practice if you have a lot to say.  Only downfall of the pad is I could use a pad with 100 sheets.  Pad could have more sheets.
436351
These are great envelopes. I use them for weekly paperwork for truck drivers that work for me. I send them through the printer and they hold up well. My only problem with these is that when it goes through the printer, the glue from the envelopes gets a little wet/warm then seals the envelopes. Buying in bulk like this has helped save me a lot of money each month!
343447
I mail out a lot of books via my book review blog, and I had been spending a lot of money buying these envelopes at my local drug store.  It finally occurred to me to check Amazon, and I found the same envelopes in bulk, for a fraction of the price.  The envelopes are sturdy, and the bubbles inside provide good protection.

One item to note - the envelopes I received (I purchased two boxes) did not include address lines as pictured in the image.  I didn't mind this, but if that's something you want, try another product.

As an money-saving FYI - If you mail books, DVD's, or CD's via the US Post Office, be certain to request they ship it via Media Mail.  You will save 50% off the usual shipping price.  Note that your package can ONLY include the media items mentioned above in order to ship via Media Mail.
4533508
Great size to hold mail that comes in large envelopes.  Easy to open.  Slate is large for postal worker to put mail in.  Also like finish.
4481771
I accidentally purchased these Mailers, when looking for some bulk "Padded/Bubble" Mailers. Naturally I was disappointed when I received these non padded mailers, but I figured for 7.5 cents per bag, they'd be worth keeping around. So far I've used around 12 of these, the only con I've found so far is trying to put shipping labels on them is a tad more difficult than a normal yellow padded mailer.

They're perfect for shipping clothes, books and games (so long as you wrap them in Bubble Wrap first), I've recieved similar items from Amazon this way, and they've always arrived in fine shape.

Pros:
Price
Size
Convinence
Seal Easily
Sturdy Enough For Books

Cons:
Slightly Difficult to tape labels onto
No Padding (Obviously)
Stick To Themselves Easily.
476445
+++ BACKGROUND +++
I have gone from shipping a few items a week on eBay to shipping several dozen. To cut costs, I have stopped using the priority bubble envelopes from the UPS and tried using these envelopes as a substitute.

+++ USEAGE AND RELIABILITY +++
The envelopes are a little thinner than what you get by purchasing a name brand but, considering how many more you get for the same amount of money, a slightly lesser quality is expected.

The bubbles are rather thin inside the envelope and so I purchased a roll of bubble wrap to double insulate items shipped inside the envelope for added protection.

The self sealing lip on the envelope is not very strong. To make sure the envelope seals properly I add two stapes through the edge of the envelope on the side with the opening.

+++ CONCLUSION +++
The expression "You get what you pay for" rings very true with these envelopes. These items are worth the purchase if you are willing to put up with average to sub-average quality product in the name of saving money.
3826993
Stock of envelope paper is heavy enough to remain durable during shipment of more hefty enclosures, such as magazines, books, etc.  Adhesive sticks well, and the "pull-and-stick" strip is a welcome convenience for those who don't like to lick envelopes.  Purchase price made this a good buy for the money.
3930501
Arrived as expected. Nice that it comes with an envelope. Saves time and money from having to buy your own. I would purchase again for gifts.
3441019
I have gone through one box of these envelopes and then purchased another. They were just as described, and the price appears fair. The main reasons this product appeals to me are that (a) the envelopes are large enough to hold a packet of letter-size documents, yet they are not much larger (which saves on cost); (b) they are security envelopes; (c) the white color appears professional; and (d) they have an adhesive that does not require moistening. They are very presentable to include as pre-addressed return envelopes for letter-size documents.
4564733
These envelopes are well made and the adhesive strip that can be pealed is convenient. I remember being told that these envelopes are the way to go for a next size up after a size #10 because it's category charged for postage by the USPS is still the same as size 10 envelope. If you go to an 8.5 x 11, you pay for a "large envelope" category, which is more postage. So the mailing price stays the same u have a bigger envelope. Paper stock is 28Lb .  I would purchase these again and plan to do so.
585552
This box folds perfectly to a CD sized box.  It will require a little tape to keep it closed during shipping though.  The great thing is it keeps the shipping weight down, so in some cases, you can ship using First Class mail, thus saving postage costs.  I always like having extra boxes on hand, and this is one I will always keep in stock.
1940129
This envelope is a very good value when shipping books that are slightly too big to fit in the most common envelope size 11" x 9".  The fact the the envelope is waterproof is a bonus, and it's so lightweight that it doesn't really add to the price of the postage.  I have even shipped dresses in these envelopes, and they got to the destination in great condition!

I would definitely recommend these envelopes to a volume shipper.
3957779
These mailers are perfect for baby clothes and other small soft things. One bag weighs next to nothing, so it will not add to your shipping costs like a box or heavy duty envelope might. And with the adhesive strip, it couldn't be any easier to package them up. I have shipped them all over the country and have not had any issue of them being opened or damaged.
3523197
Like so many others that have reviewed this item, I ordered these envelopes with the single envelopes for sending monthly billing statements.  I was concerned about the gum on the flap and I am not sure if the problems mentioned below were a momentary problem, but the envelopes we received are just fine.  It is not the stickiest glue ever, but it does close the flap securely to the envelope.  The measurements of the window's placement on the envelope are exactly as described in the product.  We measured it.  We use these in connection with a billing program called Timeslips and the envelopes work perfectly with the standard bills that are generated by that program.  The paper quality of the envelopes is pretty standard - not very think and it is not safety paper, but think enough to do the job.
1149839
I use these to ship a lot of small items. The only negative is that sometimes the seam on the bottom of the envelope catches when I feed them thru my printer.
2253121
I use this for postage. Lightweight & portable. Love that I can "tare" or "zero out" the scale which will subtract the weight if the container I'm using.
799200
Very happy with these envelopes.  Perfect size for shipping lightweight items.  Great price!