average trim size
Trim size (Book size): 5âx 8â, 5.5âx 8.5â, 5.83â³x 8.27â³/A5, 6âx 9â. Paper type available: crÃ¨me or white. The most popular size today is 6âx 9â, for both paperbacks and hardcovers. The extra room allows room for more complex layout requirements such as tables, pull quotes, lists and diagrams.