Just like you display your latest Tweets from Twitter you can also display thumbnails and titles of your latest image pins on Pinterest by using a simple WordPress widget plugin which fetches Pinterest RSS Feed from given Pinterest user ID.
Pinterest RSS Widget is a free WordPress plugin that lets you add Pinterst Pin RSS feed of specific Pinterest user. Install and activate then visit Dashboard -> Appearance -> Widgets page and drag its widget to your sidebar. It asks for simple inputs, you can give a title (optional), write your Pinterest username, Pin Board Name- this is also optional, maximum number of pins to display, thumbnail size, set display pin titles to yes or no, links to open in new or same window and size of follow me on Pinterest button. After setting these widget options, save you settings and refresh your website on front-end.
Follow me on Pinterest button gives you four different size options to show. You can also add a list of your Pinterest thumbnails in your post or page using this shortcode [prw username=”Your Pinterest Username”] and you can also use its function call to display it with your WordPress theme(View FAQs page for instructions and code).