The leather cover is so large that a normal (also thicker) DIN-A-5 Workbook fits very comfortably.
Opens the leather jacket is 33.7 cm x 23 cm in size.
The plastic strip inside the right and left is just 7 cm wide.
The quality / workmanship is very good, the leather is in this variant red (rather dull), robust (gross) and very uniform (no scars / adhesions). The envelope has a normal, slight smell of leather.
What you do not really see in the photos, is that on the front (outside) at the bottom right a square, 3cm x 3cm large, logo bearing the words "TimeTex" is.
If one uses products from TimeTex, one that is perhaps not care, but I'm not a teacher, and just wanted a simple, good leather case (without logo) for books, and because it would have been dearer to me without Logo.
However, high-quality leather cases are usually also more expensive, so the price-performance ratio is very good and I eventually find the shell very well. (You can of course turn the envelope by 180 degrees, then the logo is on the back top of the head.)
With this small reservation, I can recommend the sleeve.
I have in the variant Brown also some photos of the envelope and the logo set.