Product page size selector should be underlined for selected size

[Sivadarshan]

I am dawn theme latest version, in that product page size selector section should be underlined for the selected product alone

[BSSCommerce-B2B]

@Sivadarshan , Follow theses steps

Step 1: Go to Shopify Admin → Online Store ->Theme → Edit code

Step 2: Search file theme.liquid

Step 3: Insert this code above

Result:

If it helps you, please like and mark it as the solution.

Best Regards