What the size of this lamintor work on ?

Its entry-slot is only 9" wide and suitable for A4/A5/A6 laminator pouches.

How is it working? Is it easy to use?

Arrived quickly and completely. Laminating sheets were of 3 different sizes…Niice! Warmed up quickly, quietly and did a perfect job. Highly recommend it !!!

How waterproof does it make the paper?

I use these pouches to laminate work for my kindergarteners.They write on the pieces and then wash and dry them off with paper towels after theyre finished.The edges stay sealed and Ive never had a problem with water getting inside.

How quiet is it? Does it have a place to store the cord? Does it jam often? Can you clear it?

It is quiet and the cord is wrapped for a longer length but I did not need that. I stored the laminator back in the box.No it does not jam but if you use a smaller piece of the sheet you put through must have the sealed end.