The default option on my pattern description pages is a quick and easy Ravelry pattern download. I chose this option because it's cheapest for you and easiest for me. The Ravelry pattern download option takes you directly to PayPal, where you can either sign in with an existing account or pay with a credit/debit card. Once your purchase is completed, you will receive an email from Ravelry with a download link for your pattern.
But that's not your only choice. Here are some other ways you can purchase Itsy Bitsy Spider patterns: