Smashwords authors and publishers are authorized to use these logos and images as they wish to assist in their book marketing efforts.
To resize the images, consider using a free app such as Paint.net.
If you create buttons, badges or widgets you'd like to share with fellow Smashwords authors for their use, please email Mark Coker at first initial second initial at you know where dot com.
Smashwords offers widgets on every book page on the Smashwords web site. Authors, readers and affiliate marketers alike can create customized widgets for off-site marketing.