WooCommerce – Character (letter) count and price

Hi!

I’m new here! ??

Is there any way to make a letters counter and calculate the price of each letter?
Like this: https://www.woodlandmanufacturing.com/acrylic-letters.html
Or this: https://www.alphabetsigns.com/signs/p/IF01-16.html (Options tab)

Also, I’ll need to add other attributes such as thickness and size, but i think it’s easier.

Thank You for your help!! ??