page fault will effected because ,If the page size is very small , then ordinarily a large number of pages will be available in main memory for process,which after some time will contain portions of process near recent references leading to low page fault rate.
As the size of page is increased, each individual page will contain locations further and further from any particular recent reference. Thus, the effect of the principle of locality is weakened and the page fault rate begins to rise
internal fragmentation will be
but having one doubt how page table size be effected ....as it depend on number of pages and page entry size