1. Label size: 4.125"x6.25", with detected hole.

2. The Dymo #1744907 thermal shipping labels are 100% only compatible with Dymo LabelWriter 4XL printers.

3. The direct thermal postage mailing labels are very adhesive on boxes and envelopes.

4. MFLABEL Company is factory direct sell. Our labels are all with competitive price and premium quality.

5. We can accept custom all kinds of barcode shipping mailing labels.

6. If you have problem on the printer setup or label use, please contact us via Amazon message. We will give you a suggestion.