[beth192]

is it true that an ion in an insoluble salt is smaller and has more charges than those in soluble one?  also if this is true because the ions are smaller would they be located closer together forming a higher charge and stronger binary junction, leading to a ionic compound that's hard to dissolve?

[Borek]

is it true that an ion in an insoluble salt is smaller and has more charges than those in soluble one?

No. AgI is insoluble, NaCl is soluble. In NaCl both ions are much smaller.