Hi Jere,
Thank you for reaching out to us. This would require custom CSS as this is not a theme feature by default and is outside of our support scope, but we will do our best to help you getting started with the customization but we will not be able to implement it.
You can add the following code in the Theme Options > CSS to make the radio buttons and checkboxes bigger:
div.wpforms-container-full .wpforms-form input[type=checkbox],
div.wpforms-container-full .wpforms-form input[type=radio] {
width: 20px;
height: 20px;
}
@media screen and (max-width: 979px) {
div.wpforms-container-full .wpforms-form input[type=checkbox],
div.wpforms-container-full .wpforms-form input[type=radio] {
width: 22px;
height: 22px;
}
}
Here are some related links for further reading, this could help you in finding and implementing some CSS fixes:
Hope this helps!