February 5, 2016
I bought the A4 size after I had used several of the A5 sizes. There is an
important difference between the A4 and A5 sizes that is not well captured in
the photos or description by JetPens. The back cover is a thick kraft paper
stock, not plastic like the A5's. The A5's have the same plastic cover on the
back as the front, but not the A4 sizes. The photos do not show this well, and
the description is inaccurate - stating the cover material to be plastic.
Furthermore, the label on the backside, when removed, leaves a non-removable
darkened rectangular area, presumably from the adhesive soaking into the paper.