The Small Quiver is an item from The Legend of Zelda: Skyward Sword. It is the standard upgrade to the normal quiver and can be upgraded twice, into the Medium Quiver and Large Quiver, respectively. Stored in Link's Adventure Pouch, this upgrade can hold 5 addtional arrows. The Small Quiver can be purchased from the Gear Shop in the Skyloft Bazaar for 150 Rupees.
In addition to purchasing them from Rupin, Link can also obtain one from a Goddess Chest.