Note: Pinterest updated its layout recently, and I have updated the specifications in the article. Thanks to Chris for pointing out the size change! (04/29/13)
Pinterest can deliver significant traffic to your website (See our blog post Should Your Business Be On Pinterest?). Images are the currency on Pinterest and if you want to maximize your impact, you need to optimize your image content. Here are a few considerations:
Use good images.
Think about it from your own perspective. Look through the images on your website or blog. Would you pin them on Pinterest? If not, find better ones. This litmus test will not only make your content look better, you will be increasing the odds that other Pinterest users will find your images attractive, compelling and therefore, pinnable.
Your ideal image dimension is 736 pixels wide.
Pinterest resizes all images down to a 192-pixel wide thumbnail if in board view. Once you click on the thumbnail, Pinterest will display your image at it’s maximum size up to736 pixels wide (by any dimension tall). Therefore, to look your best you want your pinnable images to be as close to 736 pixels wide as possible.
Obviously, website layout concerns should take precedence on image size, but if you want to maximize your presence of your images on Pinterest, you could use HTML to display your 736 pixel-wide images at the width you need for your layout. So long as your source image is 736 pixels wide, that is the size it will display at on Pinterest. Using this technique will increase your site’s bandwidth requirements, so you will need to balance that concern against it’s benefits.
– Bradley Fitzhenry, Brand Manager, MJR Creative Group
Bradley on Google+
You can grab code for these, and other buttons on the Pinterest Goodies page — happy pinning!