I'll try your suggestion kobra, thanks. Does it matter if I omit medium??

I think the directory was called larger, but could have been large, I didn't add it or edit it so it's whatever it was originally.

If I want to use subfolders, to keep things organised, can I do so like this:

I have a category confectionary, so upload larger confectionary images to images/large/confectionary or is it images/confectionary/large.

Thanks
T