PA5025S Asus UX31 UX21 ADATA XM11 xm11zzb5 SSD to 2.5" SATA Adapter card is smaller than a 2.5 inch SATA HDD. 
Specifications and features: 
Fit the following models the SSD: 
Sandisk U100 Series &compatible Storage 
SDSA5JK-256G 
SDSA5JK-128G 
SDSA5JK-064G 
ADATA XM11 Series & compatible Storage 
ADATA XM11-256GB 
ADATA XM11-128GB 
size is smaller than 2.5" SATA HDD,but it can be used in laptops as 2.5" SATA HDD. 
No need extra power adapter and any drivers . 
Supports DOS, Win98/SE, 2000, Server 2003, XP, Vista, 7, Sever 2008 & Mac OS & Linux. 
Dimension: 102mm x 43mm (LxW) 

For USB SATA cable 
Suitable for 2.5" SATA Hard Drive (can NOT work with 3.5" HDD hard drive) 
USB 2.0 interface, support hot plug, plug and play, data transfer rates up to 480Mbps. 
Backwardly compatible with USB 1.0 
Powered via computer USB port, no external power required USB Y cable supports up to 7200rpm SATA HDD or more (When lack of power, please plug the additional USB connector to the computer) 
Portable size, easy and convenient to carry and use 
Built in LED Light for Power Indicate : Power, Access