In fact, this is also the correct size for a CD WITH jewel case, but unfortunately, it is oversize length-ways. This might seem a trivial point, but it has expensive consequences for those who have to post large numbers of CDs. The depth of a jewel case pushes this into the Post Office large letter band, and the unnecessary extra weight caused by the envelope being oversize almost always pushes the consignment over 100g in weight. This adds 30p to the postal cost (at 2nd class weight), which is a considerable sum when posting in quantity. We have made a jig that trims the edges of these envelopes, which will usually bring the combined weight (CD, jewel case and up to 12-page booklet) down to 98-99g, but naturally, we would prefer a specific product.