Retail Barcode Labels

Hi there! Thank you for reaching out!
The Retail Barcode Labels app itself does not provide a direct setting to increase the font size on barcode labels. However, you can customize the label templates within the app to adjust the layout and the information displayed. For more advanced customization, including font size adjustments, you might consider using a Dymo printer with Dymo Label software to print the labels, as this allows detailed design and that may include resizing of label elements including barcodes and text. We would advise confirming with Dymo directly to see if what you need is possible before doing so as they are best placed to confirm. Or you could use a third party barcode label printing app which offers that option. Hope that helps and please do feel free to reach out to us at any time via https://shopify.link/vRnL if you need any further advice. Thanks!
- Natasha, Shopify Support