Q. What is the difference between A4 size paper and letter size paper?

Answer

North America uses a completely different set of paper formats compared to the rest of the world. The world uses A4 whereas they use letter paper. The two sheets have different dimensions. There is a very marginal difference between the letter-size sheet and the A4 size sheet. A4 size paper is a little taller than the letter-size paper and the letter-size paper is a shade wider than the A4 size paper. A4 size sheet is opted for across the world whereas the letter paper is used in North America only.