The length and flexibility of an ice fishing pole can depend on several factors, such as the size of the fish you plan to catch, the depth of the water, and your personal preference. Generally, shorter poles are better for smaller fish and shallow water, while longer poles are better for larger fish and deeper water. The flexibility of the pole can also affect your success, with more flexible poles being better for detecting bites and fighting fish. To determine the best length and flexibility for your needs, consider your fishing conditions and try out different options.