If you are not to sure which pads you need take a photo of the bottom of your caravans leg and go along to your local caravan shop and say. could I have a set of pads to fit these legs on my caravan, they are straight forward to fit to the legYes. I'm new to this caravan stuff and wondered what people suggested.
I use Milenco's Stacka Corner Feet on the caravan and also have a set of Stacka Jacka Pads. I have never yet had to use the Jacka Pads on a campsite pitch though, most of them, so far, have been pretty level.They look expensive bits of plastic. I use Stacka Pads (see Milenco) website and always carry some pieces of 15 mm plywood only 6x6 inches. There are a number of different makes all of which do the job.
https://www.milenco.com/products/levelling/stacka-jacka-pads