I want to buy paper for practicing calligraphy.

The kind you are talking about is fringed paper or meta-book paper, which is available everywhere where calligraphy supplies are sold.

If you practice Chinese characters, you can use newspapers, which are economical and easy to find; Advanced printing paper and meta-book paper are both acceptable. Wool paper can be divided into manual burrs and mechanical burrs. Manual is more expensive, but more exquisite. You don't need much paper to write beautiful fonts. If you have income, you can make handmade paper, which is only a few dollars.