Customizable options for a new product type

I have the following problem:
I have a type of product, example Wooden tables and I want to give the possibility that the client can enter the measure of the table he wants and that he can also enter as many measures (length x width) as he wishes, for each measure he can order a table of wood, it would be something like this, I have added the configurable options (length and width), but I cannot find how to give the possibility of entering several measures for the same product, this draft could help:

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