Graph paper that measures 8 by 11 inches is extremely uncommon. However, standard letter-sized graph paper, which measures 8.5 by 11 inches, is sold in most school and office supply shops, as well as online stores such as Amazon.com or Office Depot.
As of 2015, a pack of 25 sheets of letter-sized graph paper costs around $2.99 and up; prices may vary depending on the quality of paper. Packs of graph paper are less expensive per sheet if purchased in bulk; a ream of 500 sheets can be as inexpensive as $7, excluding shipping and handling fees. It is also possible to print customized graph paper from online templates such as Math-Aids.com.