In the WooCommerce Product Add-Ons Ultimate plugin number fields allow you to add number input fields to your WooCommerce product.

To add a number field, just choose ‘Number’ from the ‘Field Type’ dropdown list.
Standard parameters
See this article for an overview of the standard parameters available to number fields.
Name your price parameters
Number fields have some parameters that are not shared by all fields:
Display as Slider
Enable this option to display the input field as a graphic element

Min value
Enter the minimum permitted value.
Max value
Enter the maximum permitted value.
Decimal places
Define how many decimal places to allow in the input field
Multiply price
Check this field if you would like to multiply the value of the field by the field price.