Column Width

columnwidth the width of each column in the grid.  The image width spans the columns. In version 1, the columnwidth value defaulted to 150. In version 2 (and up), the columnwidth value defaults to 1 if there is no gutter. If there is a gutter, the plugin first checks for an itemwidth and sets the

Masonry Items & Images

itemwidth The width for a grid item automatically defaults to the width of the image. You can set the width for the grid item.  The caption and the excerpt will stretch to fit the grid item while the image will default to it’s native width and height unless specified otherwise. To stretch the image, set