When printing a label that fits well within the defined size as shown in Design32, the label prints either too large or too small on the stock.
Example of Designed Label
Example of Printed Label
You have a mismatch between the resolution or DPI (Dots Per Inch) on the label in relation to the target device's print head's resolution. The labels resolution must match the resolution of the target device's print head.
If the label's resolution is higher than that of the device print head, the label will appear too large. For example: