Fortunately, a tag on the photo provides the answer, you'll find it when you move your mouse of the photo after clicking more info:
Overall: 30'' x 18'' Bowl Size: 26-3/4'' x 15-1/4 x 8-1/2'' Deep
The sink sure does look wider in the photo, however objects closer in a photo tend to look larger. Hard to think that each cabinet door under the sink would be only 15 inches wide. Maybe it is a 36" wide sink. When chosing products for your kitchen, it is best to see them in person.
To see more Rohl sinks, Shaws model, go here and click on Shaws:
http://www.rohlhome.com/Kitchen/Products.aspx?CollectionName='Sinks'
:) Rhoda