How do we know what size to get?
1) Measure the diameter of the handle at the widest point on the grip
2) Use shrink wrap that is slightly larger
3) Most shrink tubes will have a final shrink diameter, for instance, reduces by 1/3 or by 1/2 max

Package :
1 Piece 30mmo or 35mm diamater (size of the tube before shrinking)1 meter/39Inch length

Kindly remind:
1) Heat gun is the best way in my opinion.(Heat guns are relatively inexpensive on amazon)
2) Used hair dryer should work but it may take longer
3) Used, torch, lighter before you need to be more indirect with the flame or can melt it