hide and show options

Dear Sirs,

I have a webshop for women sport clothing. They have the possibility to choose a standard size or having their clothes costume made.

Because I am using the variable option in woocommerce, I only want to show your extra option tool when people click on the costume made label. At this point the options are shown at every size.

Is it possible to show the extra options only after choosing the variable option costume size and not when you click on the other options?

I made a picture of the product page. Click here to see the page.

I hope to hear from you soon!

Regards,

Lucie