When I tried creating a mask with the Circle, I got it to work beautifully in the designer.
When I tested out the masking in the product page, the image jumped up to FILL the whole product (still masked within the circle, but huge)
I tested the change after publishing and it is still “broken”
Here is a newly published to be tested
Did you opt for a fit or fill or none option when defining the image template?
I don’t recall which would be best for your design…
There was one or two great how to posts in the last forum about this…
Hopefully someone can be a little more helpful than I. And maybe someone can make a How To post for the new forum…
Cheers,
PC
…
Neder too old to learn i guess… first time i learned of masking in Zazzle… is there a ‘how to’ / tutorial somewhere that anyone knows of? Would appreciate it a lot! Thanks, Nathalie 
I can’t be completely sure, but going into the design tool, a I noticed it appears you set the image to “Fit.” It should be “Fill” to accommodate any shape image a customer might use. I don’t know this for sure, but is it possible that masking a group such as you have can throw things off?
I don’t think that I ever changed the fit/fill option before.
I tested your theory of having the wrong option chosen (it was “none” - I had the same results with all 3 choices. I found that the PROBABLE solution was I had a Long Retangular image. I cropped it to nearly square (fitting to the edges of my circle mask). This seems to work better. However … I found that the cropping will center the replacement image. I chose several different images, returning to the original one that I had cropped with the cat above center. The “new” replacement image was cropped with the cat at the center. Not bad, but ??? I’ll post this one.
Seems to work fine. I have replaced your image with one of my own and it was cropped into a square and looks alright size wise.
I think you’ve figured it out. I was just about to ask if you had changed fit / fill with FILL. It works on this link but not on your OP.
Thanks everyone for testing this out.
(I am now testing out where this will post as I hit the REPLY in my original post) - I think it will post right under the original) … YES it did!
