Hi there, lisawilkin.

Thanks for joining this thread. Allow me to address your concern, so let me get this straightened out.

As of now, there isn't an option to change the size of the label format in QuickBooks. For the meantime, you can select the available label format when printing forms by following the steps you provided. 

I can see how this feature would be helpful for you, I'd recommend sending feedback directly to our product developers for future updates. 

Here's how you can send feedback: 

1. At the top menu bar, click Help.
2. Select Send Feedback Online. 
3. Choose Product Suggestion, and fill in the feedback info.
4. Click Send Feedback. 

Please know that you're always welcome to post if you have any other questions. We're always got your back. Have a good one.