Which European envelope is comparable to the U.S. #10?
The European DL envelope would be the closest, but there is no exact comparison. European envelope sizes are corresponding to the A paper sizes (A4, A5, A6). U.S. paper sizes are larger and therefore not corresponding to the European standard sizes. An A4 sheet can be placed in a #10, but the #10 envelope is larger and therefore the size and placement of the address window would be difficult and in some countries the post taxes would be higher.
