Size finder with Blocs

Hello everybody
As already in the title, I’m looking for a way to integrate a size finder into blocs. My question now. Can one implement this or what possibility do I have for it? Can I realize this with Bric Dropdown?
Here are the links:

I’m happy to hope for tips.

Greetings Sascha

Have now written a PHP script. Now this would like to include in a form.
Next is a MySQL database used. How can I best integrate this into Blocs?