Changing size of a matching dropdown

Hi everyone,

I'm creating matching dropdown questions that have long sentences as answers.
Is there a way of changing the size of the dropdown boxes for the text to fit, instead of having to shrink the size of the text? I've been looking at all the settings I could think of, but I can't find anything, anywhere.

I really don't want to have to build a custom dropdown because of this minor issue, so I'm hoping I'm just missing a setting or something like that.

Any help or advice would be much appreciated!