Hi there @NanceP,
Welcome to the Community! Thanks for sharing your question with us!
You can definitely upload your own custom social icons to your email template to make the color and brand styling of your company! If you go this route, we recommend using images that are 96px square. To maintain spacing and alignment between Klaviyo's social icons and your custom images, use icons that are 50px wide, and both vertically and horizontally centered in the image file.
You will be able to set a max width for your custom icons within the template editor. To center your social icons, click the Block Styles tab on the left sidebar and choose to align center.
Following these guidelines should allow your images to upload without being cropped in any way.
Thanks for participating in the Community!
-Taylor