I have some 8 oz. and 1 pound size Muth jars with cork lids and now want the heat shrink bands for them. I've called Brushy and Dadant and they have given me different answers which don't make sense. Brushy says 38mm for both sizes. Dadant says 60mm for 8 oz. and 48mm for 1 lb size. Asked if she had that backwards and she put me on hold, came back and said "No, that is correct". Does anybody no how to measure properly for shrink bands and/or what is the correct size for these two jars?