Image size issue

[ominfowave]

Hello ,
Ref URL : http://mcpants.github.io/jquery.shapeshift/#/mosaic

We are using code from above URL.It is works good but , problem is image size . We have different size images to fetch from folder and display those images. Drag & drop works fine but view is not proper , all images are overlapped to each other. here is our demo link .
http://bit.ly/2lk2oAJ
Thanks.