Hello,
Please add this code in Theme Options > Styling > Custom css:
.single-product .product-information table.variations td.label, .product-information table.variations td.value {
display: inline-block;
width: auto;
}
.single-product .product-information table.variations td.label {
margin-right: 15px;
vertical-align: middle;
}
.single-product .product-information table.variations {
width: 100%;
}
.single-product .product-information table.variations td.label label {
font-size: 20px;
margin-bottom: 30px;
}
Regards