We do have customers that use both rectangle and circle labels for box closures. The OL820WG is a 0.5" x 2" on the White Gloss Inkjet material. If you want a clear material, we offer Clear Gloss Laser (CL), which is a very durable weatherproof material, as well as the Clear Gloss Inkjet (CK). I have included links to both materials for your review as well as a link to request free samples for testing. https://www.onlinelabels.com/materials/crystal-clear-laser-labels https://www.onlinelabels.com/materials/crystal-clear-inkjet-labels https://www.onlinelabels.com/samples