Same sizes in all images

Hello, I have a problem with images. All images in my shop have the same size. Image in popup have same size like small image, additional image have same sizes like all other. I did not change anything in administration. Every image have image have width="100" height="80", also in popup. Can someone tell me why?

Thank you

You may not have set up your product images correctly - so the 'small' image will be displayed when zencart cannot find the Medium or Large...
Try this thread for some guidance...

http://www.zen-cart.com/forum/showthread.php?t=9114

No, I use just one image, and ZenCart resize it. It worked well before, but now something happend and everywhere is width="100" height="80".

Have you fixed your images ? if not, can we take a look at your site?