2" Round Eyelet Vinyl Reusable Chalkboard Labels for Mason Jars (12 Pack + Chalk Pen) 12 Labels and 1 Chalk Pen. The Perfect Size for Lids, and Also Great For Jars. These high quality, dishwasher safe, 2 round vinyl chalkboard labels are the perfect way to label your Mason jars and lids! Organize your kitchen canisters, use as name tags, or stick them on almost anything smooth! Write on them with our chalk pen, then wipe them off with a damp cloth to erase. We haven't had good luck using the regular chalk we have at our house. The pen goes on clear, then turns white as it dries, so dont worry when you cant read it at first. It doesnt work well on cold or wet surfaces so we dont recommend it to label cold drinks. The pen is 13.5cm = 5.3 long. Use these premium chalkboard label stickers over and over to label the contents of your Mason jars or other glass containers! The high quality vinyl can be removed and re-stuck several times, so you can move them to a different jar or re-position them if they go on crooked. They work best on a smooth surface. The easiest way to use these is to poke out the tiny holes with a pen before you peel the sticker off the backing.