I have learn that keeping a list of measures of your home. Furniture, Rooms, Windows and more.
This had take me years to do, it’s not that I went around the house making every measure, I had collect them over the years.
It is great when you see something that you think will fit, and be sure it will. Do you know of the table of your dining room is 50 inches or 62 inches?
Me, neither but if I open the list and check, I can confirm that the list said 60 inches.