Sony 在官方網站貼出了一項新配件 ES22 手寫筆，就是配合 Xperia Z Ultra 手機的。
這支手寫筆採用伸縮設計，可以拉長至一支筆般，而筆尖十分幼，只有 1.5mm。手寫筆亦備有筆套連繩。
Interact with your Xperia™ Z Ultra touchscreen with speed and accuracy. Extend the stylus to full length for a pen-like experience. An ultra-thin (1.5 mm) point lets you write, point and draw in detail. Case and cord included.
Stylus ES22 for Xperia Z Ultra
http://www.sonymobile.com/global-en/products/accessories/stylus-es22/