It fits fine in my big machine at home (Janome Memory Craft 9000) but not in the Jem, which is a light weight machine that I take to class. Glad you got a catalog! :D
When I make pot holders using the unquilted stuff, I use two squares of it plus two squares of batting in between. That way, no matter which side of the potholder is up, the silicon progection is always there.
I have only used the quilted stuff for table runners. It is perfect as a table topper to protect our wood table. The table doesn't get hot, but sometimes there is a little condensation, so I always check the table after using it.