→The best estimation of a book will be in terms of CM(Centimeter) or Feet.
→We Should use "Centimeter Scale or Measuring tape" for this purpose.
→Otherwise, take a thread ,Put one end of thread on one end of book, that is along the longer side, and keep elongating the thread until you reach the other end.Now, with the help of Different kind of Measuring tape,you can find the length of that thread Accurately.And that will be the length of the book.
