I think you do have to click on the picture to enlarge them in Flickr or whatever, you are using, then copy the url to get a larger size. However, you did better than I did. All I am getting are Xs, this time! And I don't know what I'm doing wrong!
![Confused :?](./images/smilies/icon_confused.gif)
Glad you got to do Sketch Crawl and post your work and photos!