Images - previews and design

[JudyC]

is there any reason why my images from 'page preview' are the correct size but when I look on 'preview store' some of them are showing differently. I have checked layouts on each page and product (am using SPP) and all appear correct ?!
Thanks
Judy

[AdieB]

Don't believe Page Preview as it doesn't always display the same as the uploaded product in my experience.