The panels in a non-sip timber frame, are typically (round figures)
150mmx50mm vertical timbers, spaced every 450/600mm (can't recall) 2.4mt high, and as wide as the designer says. If the top and bottom timbers could be made 30m foot long, you could have a 30mt long piece of wall! Top and bottom lengths more likely to be 3.2, 3.6 or 4.8 metres.
On the outside face of the panel is nailed a 12mm sheet of OSB board. So the timbers and the board together make a structural bit of the building. A truck load of these arrive on site, and are butted together in sequence, and you have the ground floor. Etc etc! You fill the voids with insulation on the inside, then a plastic sheet (vapour barrier), then plasterboard.
In a sip build (structurally insulated panel) both front and back are made up, insulation installed off site. Maybe other services in them too?
Then fitted together.
My house is the former type. Not my house pic, but you get the idea. Second pic is a sip house.