Kiwi Size Chart & Recommender allows you to fully customize unit conversion by exempting specific rows or columns based on the direction of the units in your size chart.
Here's How to Exempt Specific Rows or Columns from Unit Conversion
From your Kiwi Dashboard, go to the size chart editor.
Hover your mouse over the size chart and click on "Edit Table."
In the top right, switch the editor mode to Advanced. The button should display “Advanced.”
Once you switch to the Advanced editor, you'll see black pop-up clouds: Above columns if the unit measurement direction is Column. At the start of the table if the direction is Row.
Select the row or column you want to exempt from unit conversion, then click on the pop-up.
Update the pop-up to No Units.
Don't forget to save your changes!
The selected column or row will be exempted from unit conversion, and its values will remain fixed.