Images with different sizes in woocommerce

I'm setting up a virtual store for my wife and I have a problem. I'm using WooCommerce with the theme Wootique. When you insert images into the product, even when dealing with Photoshop and leaving both images with the same size and resolution, the images appear in different sizes on the product screen. I can not standardize the size. The site is still in testing and with temporary domain. I submit below two pages to exemplify what I am saying. I wanted the image the size of this ( link ) but some look different, such as ( link ). Could someone tell me how to proceed to correct this problem?