First you want to register your website or blog with AMAZON ASSOCIATES:
(LINK IS: https://affiliate-program.amazon.com/gp/associates/network/main.html)
After registering, go to
From that page - click on the graphic that looks like this:
You will be redirected to a page where the proper HTML code can be copied and pasted to your website or blog.
You have two sizes to choose from.
AMAZON ASSOCIATES pays from between 1.75% - 8% for each purchase and or search link made from the "SEARCH BOX".
I would encourage you to always use this site, your own site, or favorite website's "SEARCH BOX" when buying from Amazon. It doesn't cost you any more and helps support your favorite sites.