These are pretty decent, but they are a bit thin as others have mentioned. I ordered a different brand directly from China of the same-sized envelopes, and I found that they were slightly wider (maybe 1/2 inch, but it makes a HUGE difference) and much thicker!For those commenting on the 4x8 inch size, it's important to note that you must also account for the HEIGHT of the item you're mailing, as these aren't boxes. I thought that went without saying, but after reading some of the comments I thouSee full review