How can I enlarge collection thumbnails on my website?

Store Design
1

when I click on a collection all of the images are small how would i make them bigger thanks for your help

www.sweetstylesboutique.com password is construction2021

2

Your Site link is not working

3

Sorry it messed up i fixed it www.sweetstylesboutique.com

4

Which collection images you want to make bigger.

5

All of them like these pages https://www.sweetstylesboutique.com/collections/all-t-shirts

6

All T-shirts – Sweet Styles boutique

7

Yes how do i make all of the pages have bigger thumbnails

8 
@media only screen and (min-width: 46.85em){
.product-card__image-wrapper {
    min-width: 18rem !important;
    height: 18rem !important;
    width: 11rem;
}}

Add this code in theme.min.css
top of the code file.

9

This makes them bigger but blurry

10

Can anyone help me make them not blurry