My wife and I are currently remodeling our new home and we wanted to make the entryway more spacious and stylish. We ended up consulting with experts at https://www.elegantentrydoors.ca/standard-exterior-door-sizes-for-canadian-homes/ regarding standard door sizes, and they helped us decide. They explained that standard single doors (usually 36 inches wide) are great for most homes, but if you want more flair, you can consider options with side glass inserts or 72x80-inch double doors. We chose the latter, and now our entryway looks great and it's much easier to bring furniture in. The key is to choose the right material and good sealing to avoid problems in the winter.