Thanks for the reply. I measured the size of my battery pack (215mm total circumference; smaller than the 9B1 battery pack). What I was wondering is if I should get the PVC Heat shrink 5% bigger, 10%, 20%? I was thinking that I read that you are supposed to get it a bit bigger than the actual size (like maybe 5% bigger wasn't optimal and that you should pick a larger size). Of course, if you get it too big it won't be able to shrink enough. Do you know? Thanks.
FYI, this is the URL I was thinking about ordering from. They seem to have a lot of large sizes.
http://www.aliexpress.com/item/180MM-lithium-batteries-lithium-heat-shrink-tubing-heat-shrink-film-sleeve-0-18MM-thick-high-quality/1843922060.html?spm=2114.01020208.3.9.rwhvMq&ws_ab_test=searchweb201556_7_79_78_77_80,searchweb201644_5,searchweb201560_7