At 8.3 x 11.7" (210x297mm), A4 paper is slightly narrower and a little longer than "A" size 8.5 x 11" paper (216x279mm). The A4 is part of the ISO "A Series," where A0, the first dimension ...

In fine print, toilet paper packaging will often admit that these sizes are relative to the “regular” roll — sometimes they mean their own brand’s regular size, but other times ...