Thank you! That's great to know. I guess everything shrinks when it comes to making preserves?

Whoa, really? So basically, place the just-cooked preserve into the jars, close and then place into the oven for ten minutes? Or do you mean sterilise the jars and lids, then place preserve into the jars and seal them? Sorry for all the questions, I just want to make sure I understand everything correctly before messing about with super-hot glass :)