The variety of uses for booklets has given rise to a number of size options when having them printed. The best paper size from booklet printing services is not a simple answer. In many cases, it depends on why you need the booklets and what you want to do with them.
One of the most popular booklet options is a CD information booklet. These must be printed on paper small enough to fit inside a jewel case of a CD. This type of booklet has a finished size of 4.75 inches by 4.75 inches. If your intended use for your booklets is for a the inside of a CD case, this is your best printing option.
Should your project incorporate large photos, your best size option may be a full-sized booklet. These have 8-1/2 inches by 11-inches pages, the same size as standard copy paper. These can be very useful for travel information packets where you want to show scenic vistas. They can also be used for home information for real estate because the large pages show better detail of photographs taken of the property.
If portability or is your main goal, half-sized booklets may be your answer. These booklets measure 5-1/2 inches by 8-1/2 inches, which makes them a better fit for the inside of mailboxes. Should you choose a direct mail printing option, these smaller booklets are more likely to make it into the mailboxes of your target audience without being folded or crushed to fit. This is also a good size booklet for including product information in a package with an item. This type of booklet can also be used for coupons.
Booklet printing is not always a one-size-fits-all matter. The best size for your printing project should be determined by what you are printing and how you want to use it. Those factors can help you make a better size selection when ordering your booklets.