I'm going to have to defer to someone more familiar with the guts of bootstrap.

You should be able to use CSS to control the element's width with either a percentage, fit-content, or some other setting. None of them effect the .table-responsive except the removal of an overflow-x:auto and you only see that in products with attributes.

It is displayed in two different sizes when the item has or doesn't have attributes but I can't find what is controlling it.

360.4 x 274

360.4 x 202