The bubble mailers are of reduced quality AND size--just compare with the old ones. They SEEM thinner (IS there less bubble wrap?). That 1/2" (?) or so in length makes a difference when I am mailing Octavo books--which is what I use the envelopes for. This quality is what you find at Ocean State Job Lot the old Building 19 or the like. Why does the No Andover MA store usually have the next size up but not this size OR vice-versa??