I purchased these mailers to mail classmates Christmas gifts in. The mailing labels and my return address labels didn't stick so I had to use packing tape to secure them. However, they were a great price and I always secure my packages with packing tape.I used this to mail CD's, but had to mail it as a "large" envelope. If you label it non-machinable it can be more than 1/4 inch thick and can be rigid. Not all post offices know this. You would be better off making it less than 6 inches the narrow way, remove the CD from its jewel case, pad it with thin foam. Mark it non-machinable and pay the additional fee. That will allow it to be rigid. Not all post offices know that this is O.K. You can use the non-machinable 70 cent butterfly stamp, but you will also need to pay for an extra ounce.The amazig color.Not as pictured... I received a flimsier version. The originals were sturdier. These will tear easy. On the plus side, it weighs .2oz to .3oz less than the original therefore saving on shipping costs if you’re trying to keep weight under a pound. If you prefer Light weight envelopes you will enjoy these. If you need a sturdy bubble mailer look elsewhere.Yay for this size! Perfect fit for me! I get this size along with the 5x9s (? I believe it is?) so I don't have to use up more than I need! I don't have to switch to my upcycling packaging material method which doesn't quite leave the same impression on my clients as these snazzy af lil mailers. Ok, they're not that little theyre the exactly not-too-little size I've been wanting! As long as Amiff keeps making eyecatching mailers I will be purchasing. I wish they would ask me for other mailer design concept ideas I'd LOVE to see some other cool designs with holo incorporated into patterns and graphic prints! Thank you again AMIFF!!!!We did a mailing and we definitely noticed in regular mail!These are perfect for my small business! Love the color as well.The picture doesn't do them Justice. They are absolutely sturdy and adhere well but the holographic sparkle is beautiful.Fancy and strong packages. Good price to start with. Come in quick and the adhesive is strong and good.Just what I wanted. PerfectionDid what I needed them to do