Currently we have a line of text showing total results, similar to :
67 results for 'Smith'
and we are told to make an expanded search option by incremental distances available if the total results is less than X number.
My thinking is if it's less than say 15 or so, offer it, but they could get back over 100. We have a 200 search results limit as it doesn't seem feasible a user would ever want that many choices to select from. However, I don't know how many results the user is expecting, other than they are going to only select one.
The results would always be the total number within a 200 mile radius, but we only show the first 10 results, then another 10 each time the user scrolls down the list. The search subject is for a medical professional, if that helps.
My question is, what is the best number for X from a UX standpoint?