It's a pretty large limit.
Most often, a new user encounters this issue because they're adding more and more fields where they should break their table design up into smaller, more numerous records--perhaps in related tables. Displaying multiple records in list view allows you to create areport with no practical limit to its length.
Perhaps if you describe why you have such a very large number of fields in one table, we can suggest a different approach that avoids this limitation.
Hi Melinda, layouts are finite. They can be max 8000 px wide and high (adding header, sub-summary, body etc parts) together.