Hanging a heavy picture on a stud wall.

[Toddlerteaplease]

What's the best way to do it?

You need plugs and screws rather than nails. And put multiple in e.g. 2 or 3 across the top to distribute the weight, rather than hanging off of one. Depending on the thickness of the wall, you can put various lengths of screw in and that + the thickness of the screws will determine which plug you need. One with wings will hold best in stud

It weighs 5kg. So would I be correct in thinking that two of the large double hooks will hold it?