Main image to square

Is there any way to make gallery main image to display aways as square. When image is click in lightbox to be in default for the image aspect ratio.
I try this but it seems it`s not responsive anymore.

.single-product-main-image
{
width: 450px;
height: 450px;
}

thank you

• This topic was modified 2 years, 10 months ago by Bobkata.