Stupid question-heat tape

[Oliverian]

Just a quickie. If you buy a huge roll of heat tape, can you cut it to the length you need or do you have to buy it the length you need? I figure you can just cut it, but better to double check. Also, do you have to cut it in 'foot' bits, or can you cut it in say one and a half feet? I'm guessing you have to do it by foot because there appears to be a division in the heat part of it every foot?

Thanks.
-TammyR