Shop Amazon St. Patrick's Day celebration supplies. From socks with a shamrock to the famous Saint Pattys Day Irish Leprechaun Green Satin top hat, there is probably the widest product range for this traditional day on amazon.com. Storybooks, LED lights, decoration products, and many more things are on sale right. And you don't have to buy the item by item. One of the deals at Amazon is a 133 pcs St. Patrick's Day decorations set. It has all accessories you need. All the greens and shamrocks can be purchased at once for only $19.99.