How can I make sure that my pony's saddle is a perfect fit I have two ponies and only one jumping saddle One is a Welsh A 11 2hh and the other is a Welsh C 12 2hh Could they share the saddle?

If the size of their withers is the same, and the saddle fits them, you could use the saddle on both of them. If you do not know how to tell if a saddle fits, asking an expert you may know or looking for more information about saddle fitting may be helpful.