These are great - I used to use the square deal 4mm polyethylene sleeves, but the last few batches have been cut short or had the dimensions for width and length reversed. As a result, 1/8”-1/16” of the record jacket sticks out above the end of the sleeve. Which makes them kind of useless for the purpose of protecting the album - I picked up a pack of these (which to be fair cost about double, or more per sleeve as opposed to the square deal 100 packs) and the dimensions have been spot on. Since then I have bought probably 6 packs of the 50’s. I wish they came in 100 / 500 packs, and that the price wasn’t over double of other sleeves that have comparable thickness. But you get what you pay for I guess. At least the size and thickness is always spot on, and have yet to encounter one that splits on the seem!