How can I add custom rug options to my product page?

[Sumitdawas]

I want a Custom rug options like these available on this page https://colonialrug.com/products/josephs-coat-grandmas-favorite-jc-1?variant=31693363707969

How can i do this ?

[PaulNewton]

Nothing special, all that is setting the literal name of a products variant options to "width" and "length" and setting the values to integers. 

They don't even bother to update the variant image when it should be  a round rug.